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Abstracts of new mineral descriptions.

J.A. Mandarino

Chairman Emeritus of the Commission on New Minerals and Mineral Names of the International Mineralogical Association and Curator Emeritus Department of Mineralogy Royal Ontario Museum 100 Queen's Park Toronto, Ontario, Canada M5S 2C6

Cobalttsumcorite (Monoclinic)

Pb[(Co,[Fe.sup.3+]).sub.2][(As[O.sub.4]).sub.2][([H.sub.2]O,OH).sub.2 ]

Locality: Am Roten Berg, Schneeberg-Neustadtel, Saxony, Germany.

Occurrence: From the oxidation zone of the deposit associated with quartz on the type specimen. Associated minerals on other samples are: Co- and Ni-bearing mawbyite, cobaltlotharmeyerite, galena, arseniosiderite and plumbogummite.

General appearance: Rosette-like aggregates (up to 2 mm in diameter) composed of tabular crystals up to 0.3 mm.

Physical, chemical and crystallographic properties: Luster: adamantine. Diaphaneity: transparent. Color: brown to red-brown. Streak: light brown. Luminescence: nonfluorescent. Hardness: [VHN.sub.25] 500 kg/[mm.sup.2], Mohs 4 1/2. Tenacity: brittle. Cleavage: {001} good. Fracture: conchoidal. Density: could not be measured, 5.31 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, C2/m, a 9.097, b 6.313, c 7.555 A, [beta] 115.08[degrees], V 393.0 [A.sup.3], Z 2, a:b:c = 1.4410:1:1.1967. Morphology: {201} dominant, {001} and {111}. Twinning: none mentioned. X-ray powder diffraction data: 4.656 (87) (111), 4.462 (96) (201) 3.243_(100) (112), 3.010 (58) (201), 2.868 (50) (021), 2.733 (47) (311), 2.538 (40) (112). Optical data: Biaxial (+), [alpha] 1.92 (calc.), [beta] 1.94, [gamma] 1.98, 2V(meas.) 70[degrees], dispersion not determined; pleochroism strong, X = light brown, Y = red-brown, Z = yellow; X ^ c = 15[degrees] in acute angle [beta], Y = b, Z ^ a = 40[degrees] in obtuse angle [beta]. Chemical analytical data: Means of seven sets of electron microprobe data: CaO <0.05, NiO 5.20, CoO 9.10, CuO <0.05, ZnO 0.52, PbO 34.23, [Al.sub.2][O.sub.3] 0.29, [Fe.sub.2][O.sub.3] 8.47, [Bi.sub.2][O.sub.3] <0.05, [P.sub.2][O.sub.5] 0.06, [V.sub.2][O.sub.5] <0.05, [As.sub.2][O.sub.5] 36.49, [SO.sub.3] 0.09, [H.sub.2]O (4.65), Total (99.10) wt.%. Empirical formula: [Pb.sub.0.97][([Co.sub.0.77][Fe.sup.3+.sub.0.67][Ni.sub.0.44][Zn.sub. 0.04][Al.sub.0.04]).sub.[SIGMA]1.96][[[([AsO.sub.4]).sub.2.02][([SO.s ub.4]).sub.0.01][([PO.sub.4]).sub.0.01]][SIGMA]2.04][[[([H.sub.2]O).s ub.1.41][(OH).sub.0.46]][SIGMA]1.87]. Relationship to other species: It is a member of the tsumcorite group; specifically, the cobalt-dominant analogue of tsumcorite.

Name: For the relationship to tsumcorite. Comments: IMA No. 1999-029.

KRAUSE, W., BERNHARDT, H.-J., EFFENBERGER, H., and MARTIN, M. (2001) Cobalttsumcorite and nickellotharmeyerite, two new minerals from Schneeberg, Germany: description and crystal structure. Neues Jahrbuch fur Mineralogie, Monatshefte 2001, 558-576.

Dickthomssenite (Monoclinic)

Mg([V.sub.2][O.sub.6]).7[H.sub.2]O

Locality: The Firefly-Pigmay mine, Sec. 30, T. 28 S., R 26 E., 16 km east of La Sal, San Juan County, Utah, USA.

Occurrence: A coating on sandstone which locally contains organic material, including log fragments, some of which contain uranium and vanadium mineralization. Associated minerals are: pascoite, sherwoodite, selenium, bariandite, devilline, rossite, hewettite, carnotite, clausthalite, coffinite, tyuyamunite, uraninite, corvusite, montroseite, roscoelite, galena, pyrite and tennantite.

General appearance: Crystals from 0.25 mm needle-like to 0.5 x 1.5 mm platy, prismatic with basal terminations. The crystals are in fibroradial groups up to 5 mm long.

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: translucent. Color: light golden brown. Streak: white. Luminescence: nonfluorescent. Hardness: 2 1/2 Tenacity: brittle. Cleavage: {100} perfect. Fracture: hackly. Density: between 1.96 and 2.09 g/[cm.sup.3] (meas.), 2.04 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, C2/c, a 38.954, b 7.2010, c 16.3465 A, [beta] 97.602[degrees], V 4544.0 [A.sup.3], Z 16, a:b:c = 5.4095:1:2.2700. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 9.704 (100) (400), 8.117 (60) (002), 5.843 (100) (400), 4.061 (50) (004), 3.139 (90) (1202), 2.920 (60) (804), 2.707 (50) (006). Optical data: Biaxial (-), [alpha] 1.6124, [beta] 1.6740, [gamma] 1.7104, 2V(meas.) 74[degrees], 2V(calc.) 73[degrees]; dispersion r < v; nonpleochroic; Y ^ c = 16.5[degrees] in acute angle [beta], X ^ a = 24.5[degrees] in obtuse angle [beta], Z = b. Chemical analytical data: Electron microprobe data were elevated due to decomposi tion of the sample under the electron beam. The analytical results with [H.sub.2]O calculated to give 7[H.sub.2]O (as indicated by the crystal structure determination) and the oxides recalculated to give 100.00 wt.% are: MgO 10.99, FeO 0.41, [V.sub.2][O.sub.5] 52.43, [H.sub.2]O (36.17), Total (100.00) wt.%. Empirical formula: ([Mg.sub.0.95][Fe.sub.0.02])[SIGMA]0.97([V.sub.2][O.sub.6]).7.00[H.su b.2]O, Relationship to other species: None apparent.

Name: For Richard ("Dick") W. Thomssen (1933-), consulting geologist from Dayton, Nevada, USA. Comments: IMA No. 2000-047. The mineral was discovered by J. Marty. Note that the crystal structure has been determined.

HUGHES, J. M., CURETON, F. E., MARTY, J., GAULT, R. A., GUNTER, M. E., CAMPANA, C. F., RAKOVAN, J., SOMMER, A., and BRUESEKE, M. E. (2001) Dickthomssenite, Mg([V.sub.2][O.sub.6]).[7H.sub.2]O, a new mineral species from the Firefly-Pigmay mine, Utah: descriptive mineralogy and arrangement of atoms. Canadian Mineralogist 39, 1691-1700.

Felbertalite (Monoclinic)

[Cu.sub.2][Pb.sub.6][Bi.sub.8][S.sub.19]

Locality: The Felbertal scheelite deposit, Felbertal, Salzburg Province, Austria.

Occurrence: It is a minor to trace constituent in laminated discordant quartz veins which contain scheelite, pyrite, pyrrhotite and chalcopyrite. Locally, associated sulphosalt minerals are: galenobismutite, cosalite, members of the bismuthinite-aikinite series (krupkaite-lindstromite range and gladite-hammarite range), argentian lillianite, Se-free junoite and members of the pavonite homolgous series. Felbertailte is always intimately intergrown with argentian lillianite and, rarely, with cannizzarite, Se-free junoite, Se-free proudite, bismuthinite derivatives and cosalite.

General appearance: Elongated crystals (up to 0.5 mm).

Physical, chemical and crystallographic properties: Luster: metallic. Diaphaneity: opaque. Color: bright white, very similar to the color of the associated sulphosalts from which it is indistinguishable. Streak: grayish black. Hardness: [VHN.sub.25] 206 kg/[mm.sup.2], Mohs about 3 1/2. Tenacity: brittle. Cleavage: {001} perfect. Fracture: uneven. Density: could not be measured, 6.88 g/[cm.sup.3] (calc.) (given as 6.95 g/[cm.sup.3]). Crystallography: Monoclinic, C2/m, a 27.637, b 4.0499, c 20.741 A, [beta] 131.258[degrees], V 1745.1 [A.sup.3], Z 2, a:b:c = 6.8241:1:5.1214. Morphology: no forms were mentioned. Twinning: none observed. X-ray powder diffraction data: 3.78 (S) (203), 3.51 (S) (313), 3.38 (S) (406), 2.320 (S) (116), 2.096 (S) (11.1.7), 2.062 (S) (117), 2.031 (S) (020), 1.744 (S) (626), 2.918 (S) (510), 1.791 (S) (223). Optical data: in reflected light: white, distinct anisotropism, perceptible bireflectance in air (a little more in oil), slightly pleochroic in grayish white and creamy white. [R.sub .1], [R.sub.2]; [[blank].sup.im][R.sub.1], [[blank].sup.im][R.sub.2]: 42.70, 46.10; 27.40, 29.55 %) 470nm, (40.65, 44.30; 25.50, 27.40 %) 546nm, (39.50, 43.20; 24.65, 26.60 %) 589 nm, (38.90, 43.10; 23.95, 25.90 %) 650 nm. Chemical analytical data: Mean of seven sets of electron microprobe data: Cu 3.56, Ag 1.10, Cd 0.43, Pb 29.9, Bi 48.3, Te 0.21, S 16.8, Total 100.30 wt.% (given as 100.4). Empirical formula: [Cu.sub.2.02][Ag.sub.0.37][Cd.sub.0.14][Pb.sub.5.20][Bi.sub.8.33]-[Te .sub.0.06][S.sub.18.89]. Relationship to other species: It is a homologue of junoite.

Name: For the locality. Comments: IMA No. 1999-042. The structure has been solved.

TOPA, D., MAKOVICKY, E., CRIDDLE, A. J., PAAR, W. H., and BALIC-ZUNIC, T. (2001) Felbertalite, [Cu.sub.2][Pb.sub.6][Bi.sub.8][S.sub.19], a new mineral species from Felbertal, Salzburg Province, Austria. European Journal of Mineralogy 13, 961-972.

Fluoro-edenite (Monoclinic)

Na[Ca.sub.2][Mg.sub.5]([Si.sub.7]Al)[O.sub.22][F.sub.2]

Locality: Near Biancavilla, Catania, Sicily, Italy.

Occurrence: In autoclasts of gray-red altered benmoreitic lavas. Associated minerals are: microgranular K-feldspar and plagioclase, quartz, clinopyroxenes, orthopyroxenes, fluorapatite, ilmenite and hematite.

General appearance: Prismatic to acicular crystals (up to 2 mm long) often in parallel bundles.

Physical, chemical and crystallographic properties: Luster: vitreous to resinous. Diaphaneity: transparent. Color: intense yellow. Streak: white-yellow. Luminescence: nonfluorescent. Hardness: 5 to 6. Tenacity: not mentioned but probably brittle. Cleavage: {110} perfect. Fracture: conchoidal. Density: 3.09 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, P2/m, a 9.847, b 18.017, c 5.268 A, [beta] 104.84[degrees], V 903.45 [A.sup.3], Z 2, a:b:c = 0.5465:1:0.2924. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 8.403 (57) (110), 3.376 (13) (131), 3.271 (48) (240), 3.125 (100) (310), 2.938 (17) (221), 2.807 (33) (330), 2.703 (25) (151), 1.8939 (18) (510), 1.6489 (14) (461), 1.4384 (14) (661). Optical data: Biaxial (-), [alpha] 1.6058, [beta] 1.6170, [gamma] 1.6245, 2V not measured, 2V(calc.) 78[degrees], dispersion not given; pleochroism not visible; Y = b, Z ^ c = 26[degrees] (in obtuse angle [beta]), X ^ a = 11[degrees] (in acute angle [beta]). Chemical analytical data: Mean of three sets of electron microprobe data: [Na.sub.2]O 3.20, [K.sub.2]O 0.84, MgO 22.65, CaO 10.83, MnO 0.46, FeO 1.60, [A1.sub.2][O.sub.3] 3.53, [Fe.sub.2][O.sub.3] 1.00, [SiO.sub.2] 52.92, Ti[O.sub.2] 0.29, F 4.35, Cl 0.07, sum 101.74, less O = F + CI 1.85, Total 99.89 wt.%. Empirical formula: [([Na.sub.0.61][K.sub.0.15]).sub.[SIGMA]0.76] [([Na.sub.0.26]-[Ca.sub.1.63][Mg.sub.0.06][Mn.sub.0.05]).sub.[SIGMA]2 .00] [([Mg.sub.4.67][Fe.sup.3+.sub.0.11][Ti.sub.003]).sub.[SIGMA]5.00] [([Si.sub.7.41][Al.sub.0.58]).sub.[SIGMA]7.99]-[O.sub.22.00] [(F.sub.1.93][O.sub.0.05][Cl.sub.0.02]).sub.[SIGMA]2.00]. Relationship to other species: A member of the amphibole group.

Name: Complies with the amphibole classification approved by the IMA. Comments: IMA No. 2000-049.

GIANFAGNA, A. and OBERTI, R. (2001) Fluoro-edenite from Biancavilla (Catania, Sicily, Italy): Crystal chemistry of a new amphibole end-member. American Mineralogist 86, 1489-1493.

Lanmuchangite (Cubic)

T1A1[([SO.sub.4]).sub.2].12[H.sub.2]O

Locality: Lanmuchang thallium (mercury) deposit, Xinren County, Guizhou Province, Peoples' Republic of China (Lat. 25[degrees]31'28" N, Long. 105[degrees]30'30" W).

Occurrence: In the oxidation zone. Associated minerals are: melanterite, pickeringite, potassium alum, jarosite, gypsum, arsenolite, sulphur and some unknown minerals.

General appearance: Anhedral granular crystals (40 to 90 [mu]m) in aggregates 2 to 10 mm. Occasionally in parallel columnar form consisting of subhedral to euhedral columnar crystals 15 to 65 [mu]m in diameter.

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: transparent. Color: yellow to white. Streak: white. Luminescence: not given. Hardness: VHN 94-124 kg/[mm.sup.2], Mohs 3 to 3 1/2. Tenacity: brittle. Cleavage: not given. Fracture: not given. Density: 2.22 g/[cm.sup.3] (meas.), 2.35 g/[cm.sub.3] (calc.). Other properties: water soluble. Crystallography: Cubic, Pa3, a 12.212 A, V 1821 [A.sub.3], Z 4. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 7.03 (54) (111), 6.11 (27) (200), 4.314 (100) (220), 3.524 (24) (222), 2.801 (70) (331), 2.731 (35) (420). Optical data: Isotropic, n 1.495. Chemical analytical data: Means of six sets of electron microprobe data ([H.sub.2]O by TGA): [Tl.sub.2]O 33.25, [Na.sub.2]O 0.00, [K.sub.2]O 0.35, MgO 0.06, CaO 0.08, FeO 0.04, [A1.sub.2][O.sub.3] 8.07, Si[O.sub.2] 0.10, [SO.sub.3] 25.19, [H.sub.2]O 33.46, Total 100.60 wt.%. Empirical formula: [([Tl.sub.1.00][K.sub.0.05]).sub.[SIGMA]1.05][([Al.sub.1.01][Si.sub.0 .01][Mg.sub.0.01]-[Ca.sub.0.01]).sub.[SIGMA]1.04] [([SO.sub.4]).sub.2.01].11.88[H.sub.2]O. Relationship to other species: It is the Tl-Al-dominant member of the alum group.

Name: For the locality. Comments: IMA No. 2001-018.

CHEN DAIYAN, WANG GUANXIN, ZOU ZHENXI, and CHEN YUMING (2001) A new mineral--lanmuchangite. Acta Mineralogica Sinica 21, 271-277 (in Chinese with an English abstract).

Lukrahnite (Triclinic)

CaCu[Fe.sup.3]+[(As[O.sub.4]).sub.2][([H.sub.2]O(OH)]

Locality: Tsumeb, Namibia. Probably also from the Pucher Shaft, Schneeberg, Saxony, Germany.

Occurrence: Associated minerals are: beudantite, cuprian adamite, conichalcite, wulfenite, quartz and chalcocite. The mineral from the Saxony locality is associated with bismuthian nickellotharmeyerite.

General appearance: Spherical aggregates (up to 0.5 mm); from the Saxony locality, tiny overgrowths <10 [micro]m thick.

Physical, chemical and crystallographic properties: Luster: dull to subadamantine. Diaphaneity: transparent. Color: yellow. Streak: light yellow. Luminescence: nonfluorescent. Hardness: [VHN.sub.25] 630 kg/[mm.sup.2], Mohs 5. Tenacity: brittle. Cleavage: none observed. Fracture: not given. Density: could not be measured, 4.18 g/[cm.sup.3] (calc.). Crystallography: Triclinic, P1 (by analogy with gartrellite), a 5.457, b 5.539, c 7.399 [Angstrom], [alpha] 68.43[degrees], [beta] 68.90[degrees], [gamma] 69.44[degrees], V 187.8 [A.sup.3], Z 1, a:b:c = 0.9852:1:1.3358. Morphology: no forms were observed. Twinning: none mentioned. X-ray powder diffraction data: 4.953 (22) (010, 100), 4.444 (20) (111), 3.416 (100)_(112), 3.186 (40) (012, 102), 2.927 (64) (111), 2.832 (26) (111, 111), 2.700 (30) (211), 2.533 (30) (201, 212), 2.468 (25) (020, 012, 102, 200, 113). Optical data: Biaxial (+), [alpha] 1.83, [beta] 1.834 (calc.), [gamma] 1.89, 2V(meas.) 30[degrees]; dispersion could not be determined; pleochroism moderate, X = yellow, Y = Z = pale yellow; orientation could not be determined. Chemical analytical data: Means of nine sets of electron microprobe data (with [H.sub.2]O calculated to give OH + [H.sub.2]O = 2): CaO 11.42, NiO 0.05, CoO 0.15, CuO 10.00, ZnO 8.19, PbO 0.69, [Al.sub.2][O.sub.3] 0.37, [Fe.sub.2][O.sub.3] 13.75, [P.sub.2][O.sub.5] 0.16, [As.sub.2][O.sub.5] 47.72, [SO.sub.3] 0.09, [H.sub.2]O (6.21), Total (98,80) wt.%. Empirical formula: [([Ca.sub.0.97][Pb.sub.0.01][Co.sub.0.01]).sub.[SIGMA]0.99][([Cu.sub. 0.60][Zn.sub.0.48]).sub.[SIGMA]1.08][([Fe.sup.3+.sub.0.82][Al.sub.0.0 3]).sub.[SIGMA]0.85][[(As[O.sub.4]).sub.1.98](P[O.sub.4]).sub.0.01][( [SO.sub.4].sub.0.01][SIGMA]2.00 [([H.sub.2]O).sub.1.30][[(OH).sub.0.70].sub.[SIGMA]2.00]. Relationship to other species: It is the Ca-dominant analogue of gartrellite.

Name: For Ludger Krahn (1957-) who provided the first specimen of the mineral for investigation. Comments: IMA No. 1999030. A slightly different calculated value for [H.sub.2]O is given here.

KRAUSE, W., BLASS, G., BERNHARDT, H.-J., and EFFENBERGER, H. (2001) Lukrahnite, [CaCuFe.sup.3+][(As[O.sub.4]).sub.2][([H.sub.2]O)(OH)], the calcium analogue of gartrellite. Neues Jahrbuch fur Mineralogie, Monatshefte 2001, 481-492.

Natrolemoynite (Monoclinic)

[Na.sub.4][Zr.sub.2][Si.sub.10][O.sub.26].9[H.sub.2]O

Locality: Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada.

Occurrence: In pegmatites cutting nepheline syenite. Associated minerals in altered pegmatites are: microcline, lemoynite, lepidocrocite, galena, sphalerite, calcite and pyrite. Associated minerals in unaltered pegmatites are: biotite, microcline, albite, magnetite, a chlorite group mineral, a burbankite group mineral, an unidentified donnayite-(Y)-like mineral, zircon and pyrochlore.

General appearance: Bladed to prismatic crystals (up to 1 x 2 mm); typically in compact radial aggregates and spheres up to 4 mm in diameter.

Physical, chemical and crystallographic properties: Luster: vitreous to subadamantine. Diaphaneity: transparent to translucent. Color: colorless to white; may have a slightly pink to red tinge. Streak: white. Luminescence: nonfluorescent. Hardness: 3. Tenacity: brittle. Cleavage: {100} and {010} perfect, {001} poor. Fracture: uneven. Density: 2.47 g/[cm.sup.3] (meas.), 2.50 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, C2/m, a 10.5150, b 16.2534, c 9.1029 A, [beta] 105.462[degrees], V 1499.4 [A.sup.3], Z 2, a:b:c = 0.6469:1:0.5601. Morphology: {100}, {010} and {001} dominant; also minor unidentified pinacoid-like forms. Twinning: none mentioned. X-ray powder diffraction data: 8.832 (30) (001), 8.132 (100) (020), 5.975 (40) (021), 3.974 35) (201), 3.693 (30) (041), 3.564 (40) (221), 3.490 (35) (222), 2.804 (30) (242). Optical data: Biaxial (-), [alpha] 1.533, [beta] 1.559, [gamma] 1.567, 2V(meas.) 63[degrees], 2V(calc.) 57_; dispersion crossed axial plane, weak; nonpleochroic; X = b, Y ^ c=25. 5[degrees] in acute angle [beta]. Z ^ a = 41[degrees] in obtuse angle [beta]. Chemical analytical data: Means of nineteen sets of electron microprobe data (with [H.sub.2]O calculated to give 9[H.sub.2]O; presence confirmed by IR and structure determination): [Na.sub.2]O 7.47, [K.sub.2]O 1.29, CaO 0.37, MnO 0.12, [Al.sub.2][O.sub.3] 0.04, Si[O.sub.2] 54.51, Ti[O.sub.2] 0.38, Zr[O.sub.2] 21.97, [H.sub.2]O (14.72), Total (101.88) wt. %. Empirical formula: [([Na.sub.2.67][K.sub.0.30][Ca.sub.0.07][Mn.sub.0.02]).sub.[SIGMA]3.0 6]][(Zr.sub.1.97][Nb.sub.0.08][Ti.sub.0.05]).sub.[SIGMA]2.10][([Si.su b.10.05][Al.sub.0.01]).sub.[[SIGMA]10.06]][O.sub.25.96].9.04[H.sub.2] O. Relationship to other species: It is chemically and structurally related to lemoynite, [(Na,K).sub.2] [CaZr.sub.2] [Si.sub.10][O.sub.26].5-6[H.sub.2]O, and altisite, [Na.sub.3][K.sub.6][Ti.sub.2]-[Al.sub.2][Si.sub.8][O.sub.26][Cl.sub.3 ]

Name: For the relationship with lemoynite. Comments: IMA No. 1996-063. The crystal structure has been solved.

McDONALD, A. M. and CHAO, G. Y. (2001) Natrolemoynite, a new hydrated sodium zirconosilicate from Mont Saint-Hilaire, Quebec: description and structure determination. Canadian Mineralogist 39, 1295-1306.

Nickelotharmeyerite (Monoclinic)

Ca[(Ni,[Fe.sup.3+]).sub.2][(As[O.sub.4])sub.2][([H.sub.2]O,(OH).sub.2 ]

Locality: The Pucher shaft, Schneeberg-Neustadtel, Saxony, Germany.

Occurrence: From the oxidation zone of the deposit associated with quartz on the type specimen. Associated minerals on other samples are: lukrahnite, Ni- and Co-bearing ferrilotharmeyerite, mawbyite, arseniosiderite, zeunerite and barium-pharmacosiderite.

General appearance: Tiny aggregates (up to 0.5 mm) and crusts grown in small cavities; single crystals are usually < 50 [micro]m.

Physical, chemical and crystallographic properties: Luster: subadamantine. Diaphaneity: transparent. Color: brown to yellow. Streak: light brown to yellow. Luminescence: nonfluorescent. Hardness: [VHN.sub.25] 500 kg/[mm.sup.2], Mohs 4 1/2. Tenacity: brittle. Cleavage: none observed. Fracture: conchoidal. Density: could not be measured, 4.45 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, C2/m, a 9.005, b 6.205, c 7.411 A, [beta] 115.31[degrees], V 374.4 [A.sup.3], Z 2, a:b:c = 1.4512:1:1.1944. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 3.393 (55) (202), 3.182 (76) (112), 2.962 (100) (201), 2.816 (66) (021), 2.703 (66) (311), 2.538 (75) (222), 1.697 (53) (331, 420, 511, 404). Optical data: Biaxial (+), [alpha] 1.80 (calc.), [beta] 1.81, [gamma] 1.87, 2V(meas.) 40[degrees], dispersion not determined; pleochroism strong, X = yellow, Y = brown, Z = pale yellow; X [approximately equal to] c, Y = b, Z ^ a [approximately equal to] 25[degrees] in obtuse angle [beta]. Chemical analytical data : Means of eleven sets of electron microprobe data: CaO 9.29, NiO 12.86, CoO 3.83, CuO 0.11, ZnO 0.62, PbO 0.90, [Al.sub.2][O.sub.3] <0.05, [Fe.sub.2][O.sub.3] 12.88, [Bi.sub.2][O.sub.3] 8.56, [P.sub.2][O.sub.5] 0.23, [V.sub.2][O.sub.5] <0.05, [As.sub.2][O.sub.5] 45.32, [SO.sub.3] 0.12, [H.sub.2]O (5.35), Total (100.7) wt. %. Empirical formula: [([Ca.sub.0.83][Bi.sub.0.18]).sub.[SIGMA]1.01][([Ni.sub.0.86][Fe.sup. 3+.sub.0.81] [Co.sub.0.26]-[Zn.sub.0.04][Pb.sub.0.02][Cu.sub.0.01).sub.[SIGMA]2.00 ][[([AsO.sub.4]).sub.1.98][([PO.sub.4]).sub.0.02][([SO.sub.4]).sub.0. 01]].sub.[SIGMA]2.01] [([H.sub.2]O).sub.1.00]-[(OH).sub.0.99]].sub.[SIGMA]1.99]. Relationship to other species: It is a member of the tsumcorite group; specifically, the nickel-dominant analogue of lotharmeyerite.

Name: For the relationship with lotharmeyerite. Comments: IMA No. 1999-008.

KRAUSE, W., BERNHARDT, H.-J., EFFENBERGER, H., and MARTIN, M. (2001) Cobalttsumcorite and nickellotharmeyerite, two new minerals from Schneeberg, Germany: description and crystal structure. Neues Jahrbuch fur Mineralogie, Monatshefte 2001, 558-576.

Ominelite (Orthorhombic)

(Fe,Mg)[Al.sub.3][BsiO.sub.9]

Locality: Along the Misen River, Misen pluton, Omine Mountains, Nara Prefecture, Japan.

Occurrence: In a porphyritic granite and granodiorite. Associated minerals are: alkali-feldspar, plagioclase, quartz, sekaninaite, andalusite, topaz, garnet, biotite, muscovite, dumortierite, schorl, zircon, apatite, monazite, ilmenite, pyrite, cordierite, sericite and chlorite.

General appearance: Elongated and euhedral to equant and anhedral grains (up to 0.5 mm long).

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: not mentioned but probably transparent to translucent. Color: blue. Streak: pale blue. Luminescence: none mentioned. Hardness: about 7. Tenacity: not given but probably brittle. Cleavage: none. Fracture: not given. Density: not measured, 3.20 g/[cm.sup.3] (calc.); given as 3.169 g/[cm.sup.3]. Crystallography: Orthorhombic, Pbnm, a 10.343, b 11.095, c 5.7601 A, V661.0 [A.sup.3], Z 4, a:b:c = 0.9322:1:0.5192. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 5.21 (vs) (200), 5.05 (vvs) (101), 2.97 (s) (301), 2.79 (s) (040), 2.18 (s) (150, 421, 312). Optical data: Biaxial (-), [alpha] 1.631, [beta] 1.654, [gamma] 1.656, 2V(meas.) 31.5[degrees], 2V(calc.) 32[degrees]; dispersion v [much greater than] r, strong; pleochroism X = pale blue-green, Y = colorless, Z = pale blue-green; orientation, Y = c. Chemical analytical data: Means of five sets of electron microprobe data: MgO 1.20, GaO -, MaO 0.44, FeO 21.05, ZnO 0.20, [B.sub.2][O.sub.3] 10.69, [A1.sub.2][O.sub.3] 47.98, [SiO.sub.2] 19.22, [P.sub.2][O.sub.5] F -, Total 100.99 wt.%. Empirical formula: [([Fe.sub.0.92][Mg.sub.0.09][Mn.sub.0.02]-[Zn.sub.0.01]).sub.[SIGMA]1 .04][Al.sub.2.97][B.sub.0.97][(Si.sub.1.01][P.sub.0.01]).sub.[SIGMA]1 .02][O.sub.9.00]. Two other sets of analytical data are given. Relationship to other species: It is the [Fe.sup.2+]- dominant analogue of grandidierite, (Mg, [Fe.sup.2+])[Al.sub.3][BsiO.sub.9].

Name: For the Omine Mountains. Comments: IMA No. 1999-025.

HIROI, Y, GREW, E. S., MOTOYOSHI, Y, PEACOR, D. R., ROUSE, R. C., MATSUBARA, S., YOKOYAMA, K., MIYAWAKI, R., MCGEE, J. J., SU, S.-C., HOKADA, T., FURUKAWA, N., and SHIBASAKI, H. (2002) Ominelite, (Fe,Mg)[Al.sub.3][BsiO.sub.9] ([Fe.sup.2+] analogue of grandidierite), a new mineral from porphyritic granite in Japan. American Mineralogist 87, 160-170.

Orthominasragrite (Orthorhombic)

[V.sup.4+]O([SO.sub.4])[([H.sub.2]O).sub.5]

Locality: The North Mesa mine group (west 1/2, southwest 1/4 of section 35, Township 24 South, Range 11 East), Temple Mountain mining district, Emery County, Utah, USA.

Occurrence: In a silicified tree, approximately 46 cm wide by 30 cm high by an undetermined length. Associated minerals are: pyrite, "various iron sulfates," sulfur, minasragrite and an as-yet undescribed vanadium sulfate.

General appearance: Rounded aggregates (up to 200 [mu]m across).

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: not mentioned. Color: pale blue to bright blue. Streak: pale blue. Luminescence: nonfluorescent. Hardness: approximately 1. Tenacity: not mentioned. Cleavage: none observed. Fracture: not mentioned. Density: could not be measured, 2.00 g/[cm.sup.3] (calc.). Crystallography: Orthorhombic, [Pmn2.sub.1], a 7.246, b 9.333, c 6.210 A, V 420.0 [A.sup.3], Z 2, a:b:c = 0.7764:1:0.6654. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 4.699 (100B) (101), 3.734 (20) (021), 3.622 (20) (200), 3.322 (50) (121), 3.108 (20) (002), 2.865 (40) (220), 2.602 (30) (221), 2.363 (20) (230, 202), 2.030 (20) (321). Optical data: Biaxial (-), [alpha] 1.529, [beta] 1.534, [gamma] 1.534, 2V(meas.) +2[degrees], 2V(calc.) 0[degrees]; dispersion not mentioned; nonpleochroic; orientation, X = b Y = c, Z = a. Chemical analytical data: Electron microprobe data (with [H.sub.2]O calculated to give 5 [H.sub.2]O): [VO.sub.2] 33.88, [SO.sub.3] 31.97, [H.sub.2]O (36.30), Total (102.15) wt.%. Empirical formula: [V.sub.1.01][O.sub.1.04][([SO.sub.4]).sub.0.99]-5.00[H.sub.2]O. Relationship to other species: It is the orthorhombic polymorph of minasragrite.

Name: For the relationship with minasragrite, the monoclmic polymorph. Comments: IMA No. 2000-018.

HAWTHORNE, F. C., SCHINDLER, M., GRICE, J. D., and HAYNES, P. (2001) Orthominasragrite, [V.sup.4+]O([SO.sub.4])[([H.sub.2]O).sub.5], a new mineral species from Temple Mountain, Emery County, Utah, U.S.A. Canadian Mineralogist 39, 1325-1331.

Oswaldpeetersite (Monoclinic)

[([UO.sub.2]).sub.2][CO.sub.3][(OH).sub.2].[4H.sub.2]O

Locality: The Jomac uranium mine, Brown's Rim, San Juan County, Utah, USA.

Occurrence: In the Tertiary Shinarump conglomerate which is rich in organic material such as black coal-bearing smears and logs of partially petrified wood. Associated minerals are: gypsum, cuprite, antlerite, goethite, lepidocrocite, mbobomkulite, hydrom-bobomkulite, sklodowskite and two undefined uranium minerals.

General appearance: Micrometric prismatic crystals (approximately 0.1 x 0.01 x 0.002 mm) arranged in radiating groups.

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: transparent. Color: canary yellow. Streak: pale yellow. Luminescence: nonfluorescent. Hardness: between 2 and 3. Tenacity: weak. Cleavage: parallel to the elongation. Fracture: uneven. Density: greater than 4.10 g/[cm.sup.3] (meas.), 4.55 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, [P2.sub.1]/c, a 4.1425, b 14.098, c 18.374 A, [beta] 103,62[degrees], V 1042.8 [A.sup.3], Z 4, a:b:c = 0.2938:1:1.3033. Morphology: {100}, {010}, {001}, acicular and heavily striated parallel to the length. Twinning: none mentioned, X-ray powder diffraction data: 8.95 (65) (002), 7.54 (63) (012), 4.55 (96) (031), 4.26 (60) (014), 3.46 (62) (015), 3.32 (100) (114), 3.029 (85) (043), 2.273 (62) (062), Optical data: Biaxial (-), [alpha] 1.583, [beta] 1.669, [gamma] 1.712, 2V not measured, 2V(calc.) 67[degrees]; dispersion not observed; pleochroism X and Y = very pale yellow to colorless, Z = pale yellow; Z [approximately equal to] a, elongation is positive. Chemical analytical data: Means of ten sets of electron microprobe data: [UO.sub.3] 81.47, [H.sub.2]O 12.30 (by TGA), [CO.sub.2] (6.23) (by difference), Total (100.00) wt.%. Empirical formula: [([UO.sub.2]).sub.2.03][([CO.sub.3]).sub.1.01],[(OH).sub.2.04].3.85[H .sub.2]O. Relationship to other species: None apparent.

Name: For Maurice Oswald Peeters (1945-), structural crystallographer at the University of Leuven, Belgium, and researcher in the field of uranium mineralogy. Comments: IMA No. 2000034. The mineral was discovered by Patrick Haynes of Cortez, Colorado, USA.

VOCHTEN, R., DELIENS, M., and MEDENBACH, O. (2001) Oswaldpeetersite, ([[UO.sub.2]).sub.2][CO.sub.3][(OH).sub.2].[4H.sub.2]O, a new basic uranyl carbonate mineral from the Jomac uranium mine, San Juan County, Utah, U.S.A. Canadian Mineralogist 39, 1685-1689.

Pararsenolamprite (Orthorhombic)

As

Locality: The dump of the Mukuno mine (Lat. 33[degrees]28'47" N, Long. 131[degrees]26' 15" E), Yamago-cho, Oita Prefecture, Kyushu, Japan.

Occurrence: In a hydrothermal Sb-As-Ag-Au ore deposit. Associated minerals are: arsenic, stibnite and quartz. Other minerals in the deposit are: pyrite, miargyrite, argentian tetrahedrite, gold, lollingite, claudetite and kankite.

General appearance: Radial or parallel aggregates of bladed crystals (up to 0.8 mm long).

Physical, chemical and crystallographic properties: Luster: metallic. Diaphaneity: opaque. Color: lead gray. Streak: black. Hardness: [VHN.sub.25] 66 to 91 kg/[mm.sup.2], Mohs 2 to 2 1/2. Tenacity: sectile and brittle. Cleavage: {001} perfect. Fracture: not mentioned. Density: 5.88 g/[cm.sup.3] (meas.), 5.99 g/[cm.sup.3] (calc.). Crystallography: Orthorhombic, [Pmn2.sub.1] or [P2.sub.1]nm, a 3.663, b 10.196, c 10.314 A, V382.1 [A.sup.3], Z 18, a:b:c = 0.3563:1:1.0116. Morphology: {001}, elongated on [100] and flattened on {001}. Twinning: none mentioned. X-ray powder diffraction data: 5.17 (100) (002), 4.60 (24) (012), 3.259 (58) (013), 2.840 (27) (032), 2.580 (22) (004), 2.299 (23) (024), 1.794 (26) (105). Optical data: In reflected light: white with a slightly greenish blue tint, strong anisotropism (dark brown, greenish gray), distinct bireflectance (cream parallel to elongation and brown, gray, green perpendicular to elongation). [R.sub.1], [R.sub.2], [[blank].sub.im][R.sub.1], [[blank].sup.im][R.sub.2]: (49.0, 44.0; 3 3.6, 29.3 %) 470nm, (47.0, 42.1; 31.5, 28.0 %) 546nm, (44.8, 39.9; 29.7, 26.9 %) 589nm, (44.9, 40.3; 29.2, 26.0 %) 650nm. Chemical analytical data: Means of eight sets of electron microprobe data: As 91.89, Sb 7.25, S 0.48, Total 99.62 wt.%. Empirical formula: [([AS.sub.0.94][Sb.sub.0.05][S.sub.0.01]).sub.[SIGMA]1.00]. Relationship to other species: It is the third polymorph of As; the others are arsenic (trigonal) and arsenolamprite (orthorhombic).

Name: For the relationship with arsenolamprite. Comments: IMA No. 1999-047.

MATSUBARA, S., MIYAWAKI, R., SHIMIZU, M., and YAMANAKA, T. (2001) Pararsenolamprite, a new polymorph of native As from the Mukuno mine, Oita Prefecture, Japan. Mineralogical Magazine 65, 807-812.

Rinmanite (Hexagonal)

[Zn.sub.2][Sb.sub.2][Mg.sub.2][Fe.sub.4][O.sub.14][(OH).sub.2]

Locality: The Garpenberg Norra zinc-lead mine, Hedemora, Dalarna, south-central Sweden.

Occurrence: In a skarn assemblage within dolomite marble. Associated minerals are: dolomite, calcite, manganoan tremolite, zincian manganocummingtonite, manganoan talc, franklinite, barite and svabite.

General appearance: Euhedral prismatic crystals (up to about 0.5 mm).

Physical, chemical and crystallographic properties: Luster: submetallic. Diaphaneity: opaque. Color: black. Streak: brown. Hardness: [VHN.sub.100] 880 kg/[mm.sup.2], Mohs about 6. Tenacity: not given. Cleavage: {100} well developed. Fracture: splintery. Density: could not be measured, 5.11 g/[cm.sup.3] (calc.). Crystallography: Hexagonal, [P6.sub.3]mc], a 5.9889, c 9.353 A, V 290.53 [A.sup.3], Z1, c:a = 1.5617. Morphology: no forms were mentioned. Twinning: none mentioned. X-ray powder diffraction data: 3.474 (34) (102), 2.994 (43) (110), 2.673 (44) (103), 2.522 (100) (112), 1.6597 (28) (213), 1.5170 (33) (205), 1.4972 (54) (220). Optical data: In reflected light: gray, moderate anisotropism, weak bireflectance, nonpleochroic. [R.sub.o], [R.sub.e]: (13.6, 12.2 %) 460nm, (12.9, 11.8 %) 540nm, (12.7, 11.7 %) 580nm, (12.1, 11.3 %) 660nm. In transmitted light, uniaxial (-), dichroic with O dark red and E orange-red; approximate indices of refraction calculated from reflectance data at 589nm are [omega] 2.10, [epsilon]' 2.04. Chemical analytical data: Means of thirty sets of electron microprobe data: MgO 8.97, MnO 2.47, ZnO 14.24, [A1.sub.2][O.sub.3] 0.82, [Fe.sub.2][O.sub.3] 34.33, [TiO.sub.2] 0.01, [Sb.sub.2][O.sub.5] 36.31, [H.sub.2]O 1.99, Total 99.14 wt.%. Empirical formula: ([Zn.sub.1.58][Mn.sub.0.31][Mg.sub.0.06]).[SIGMA]1.95][Sb.sub.2.03](M g.sub.1.95][Fe.sub.3.88][Al.sub.0.15])[SIGMA]5.98][O.sub.14.01][(OH). sub.1.99]. Relationship to other species: It is isostructural with nolanite, [([V.sup.3+],[Fe.sup.2+],[Fe.sup.3+],Ti).sub.10][O.sub.14][(OH).sub.2 ].

Name: For Sven Rinman (1720-1792), mining scientist, metallurgist and chemist who was a member of the Bergskollegium (Board of Mines). He is sometimes considered the father of the Swedish mineral industry. Comments: IMA No. 2000-036.

HOLTSTAM, D., GATEDAL, K., SODERBERG, K., and NORRESTAM, R. (2001) Rinmmite, [[Zn.sub.2][Sb.sub.2][Mg.sub.2][Fe.sub.4][O.sub.14][(OH).sub.2], a new mineral species with a nolanite-type structure from the Garpenberg Norm mine, Dalarna, Sweden. Canadian Mineralogist 39, 1675-1683.

Rouaite (Monoclinic)

[Cu.sub.2]([NO.sub.3])[(OH).sub.3]

Locality: The old copper mines at Roua, Alpes Maritimes, France. It has been identified also from the Sterling Hill mine, Ogdensburg, New Jersey, USA.

Occurrence: In cavities in cuprite. Associated minerals are: cuprite, copper, silver, algodonite, domeykite, malachite, connellite, olivenite, theoparacelsite and gerhardtite.

General appearance: As aggregates (up to 0.5 mm in diameter) of equidimensional to elongated crystals (up to 0.1 mm long).

Physical, chemical and crystallographic properties: Luster: vitreous. Diaphaneity: transparent. Color: dark emerald green. Streak: green. Luminescence: nonfluorescent. Hardness: could not be measured because of the small size. Tenacity: brittle. Cleavage: {001} perfect. Fracture: uneven. Density: 3.38 g/[cm.sup.3] (meas.), 3.38 g/[cm.sup.3] (calc.). Crystallography: Monoclinic, [P2.sub.1], a 5.596, b 6.079, c 6.925 A, [beta] 94.67[degrees], V 234.8 [A.sup.3], Z 2, a:b:c = 0.9205:1:1.1392. Morphology: {001}, {100}, {110}, {1 10}, {0 11}. Twinning: rare on {001}. X-ray powder diffraction data: 6.91 (100) (001), 3.457 (90) (111, 002), 2.669 (80) (120), 2.462 (80) (121), 2.250 (50) (202), 2.154 (40) (013), 2.078 (50) (122, 103). Optical data: Biaxial (+), [alpha] 1.700, [beta] 1.715, [gamma] 1.738, 2V(meas.) 81[degrees], 2V(calc.) 79[degrees]; dispersion r < v, strong; pleochroism X = dark green blue, Y = green blue, Z = light green to colorless; X ^ a 5[degrees] (in obtuse angle [beta]), Y = b, Z [approximately equal to] c. Chemical analytical data: Mean of five sets of electron microprobe data ([H.sub.2]O by CHN): CuO 65.50, [N.sub.2][O.sub.5] 21.64, [H.sub.2]O 11.90, Total 99.04 wt.%. Empirical formula: [Cu.sub.1.99] [([NO.sub.3]).sup.0.97]-[(OH).sub.3.19]. Relationship to other species: It is a dimorph of gerhardtite (orthorhombic).

Name: For the type locality. Comments: IMA No. 1999-010.

SARP, H., CERNY, R., and GUENEE, L. (2001) Rounite, [Cu.sub.2]([NO.sub.3])[(OH).sub.3], un nouveau mineral: sa description et sa structure cristalline Alpes-Maritimes, France). Riviera Scientifique 85, 3-12.
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Author:Mandarino, J.A.
Publication:The Mineralogical Record
Date:Jul 1, 2002
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