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American Mineralogist, Volume 64, pages 1329-1334, 1979 NEW MINERAL NAMES* MICHAEL FLEISCHER, ROGER G. BURNS, LOUIS J. CABRI, GEORGE Y. CHAO, D. D. HOGARTH AND ADOLF PABST Bogdanovite* plosive pipe, middle course of the Angara River, southern Sibe- rian Platform. Analysis by N.G.T. gave MgO 30.84, FeO 4.10, E. M. Spiridonov and T. N. Chvileva (1979) Bogdanovite, MnO 0.05, Ti02 0.20, Fe203 1.15, AI203 21.20, Na20 0.36, H20+ AU5(Cu,Fe)3(TejPbh, a new mineral of the group of inter- 27.19, H20- 5.20, CIIl.3I, C02 1.10, sum 102.70 - (0 = C12) metallic compounds of gold. Vestnik Moskva Univ., Ser. Geol., 2.55 = 100.15%. Si02, CaO, K20, F, S03 not found. This cor- 1979, no. 1,44-52 (in Russian). responds to (Mg4.s1 Fe~~6Mno.ol)(AI2.62Fe~:'o9 Tio.02N ao.os) (OH)16[CI2.o\(OH)0.32(t C03)0.nI . 3.20H20; manasseite is Microprobe analyses are given of II samples, 4 iron-rich, 3 cop- Mg6AI2(OH)16(C03) . 4H20. per-rich, and 4 intermediate. Range of composition Au 57.6-63.6, The X-ray pattern is very similar to that of manasseite. The Ag 1.67-3.39, Cu 3.32-15.1, Fe 10.28-0.09, Pb 10.7-14.4, Te 9.60- strongest lines (21 given) are 7.67( I0)(002), 3.86(8)(004), 10.3, Se 0-0.28%, corresponding to the formula above. Cu and Fe 2.60(8)(20 1,113), 2.49(7)(202), 2.34(9)(203), 2.17(9)(204), vary reciprocally from CU3.36FeO.32 to CUo.75Fe2.66' 1.839( 10)(206), 1.555(8)(208), 1.526(9)(220), 1.496(9)(222). This X-ray data indicate a pseudocubic cell, derived from that of corresponds to a unit cell with a = 6.1I:!:0.0I, c = 15.46:!:0.05A. gold, with a = 4.087 A. However, the optics show that the mineral The mineral occurs in cavities in magnetite ore, closely inter- is probably orthorhombic. The strongest lines (16 given) for iron- grown with (and possibly formed by the alteration of) chlorite by rich material are 2.36(10)(111), 2.045(6)(200), 1.447(6)(220), NaCl-rich solutions. Platy crystals up to several mm in size have 1.230(8)(311 ). the form of dipyramids. Colorless to greenish-brown, luster vit- Bogdanovite is rose-brown to bronze-brown with semi-metallic reous to pearly on the perfect basal cleavage. Soft. G = 1.98 (yel- luster. It polishes well. Cleavage is absent. In polished section un- lowish-brown), 2.09 (colorless). Optically uniaxial, positive, w = usual color effects (like rickardite and bilibinskite) from purple- 1.540, E = 1.560; colorless in section. M.F. raspberry or grayish-lilac to gold and yellow are seen. Reflect- ances are given (Rg and Rp) at 15 wavelengths from 420 nm to 700 nm. For Cu-rich, 460 nm, 14.8,9.2%; 540, 29.5, 5.6; 580, 37.6, Chrompyroaurite (= chromian pyroaurite) 8.4; 660, 39.0, 36.2; for Fe-rich, 460, 13.8, 6.7; 540, 28.3, 2.5; 580, 36.4,3.0; 660, 35.8, 29.9. The microhardness is much more affected Zhang Rubo, Liu Kiyin, Yang Benjin, Liu Yunxia, and Liri by change of composition: for Cu-rich 235-270, avo 257 kg/sq. Dehna (1978) Chrompyroaurite, Mg6(Fe+3,Crh(C03) mm; for Fe-rich 290-354, avo 321 kg/sq. mm. Relief higher than (OH)16 . 4H20, a new variety on the pyroaurite- for gold. The mineral quickly tarnishes in air to bluish-black. stichtitejoin. Geochimica (China), 1978, no. 4,281-290 (Chinese Bogdanovite occurs with bilibinskite in the supergene zone of with English abstr.). oxidation of deposits in Kazakhstan and Far Eastern USSR, asso- ciated with gold, various tellurides, and tellurites of Fe, Cu, and Two analyses of the mineral, found in serpentinite, SW China, Pb. gave Fe203 13.54, 12.79; Cr203 6.94, 7.49; Al203 2.21, 1.74; MgO The name is for the Soviet geologist Aleksei A. BogdaJl.ov. 36.74,35.62; FeO 0.1, 0.15; MnO 0.06, 0.01; C02 6.45,7.78; H20 + 1907-1971. Type material is in the Mineralogical Museum, Acad. 32.33, 32.30; H20- 2.38, 1.78; sum 100.75, 100.56%. For the sec- Sci. USSR, Moscow. M.F. ond analysis, this gives Fe:Cr:AI = 1.05:0.63:0.22. G = 2.12, H = 1-1.5; uniaxial neg., w = 1.556, E = 1.545. The DTA curve shows endothermic peaks at 270° and 460°C. Trigonal, a = 6.165, c = ChIormanasseite 46.760A. Color violet. Pleochroic, 0 colorless, E pale pink. G. D. Feokistov, S. I. Ivanov, A. A. Kashaev, L. N. Klyuchanskii, Discussion N. G. Taskina and Z. F. Ushchapovskaya (1978) The occur- An unnecessary name for chromian pyroaurite. M.F. rence of chlormanasseite in the USSR. Zap. Vses. Mineral. Obshch., 107, 321-325 (in Russian). Garavellite* The name chlormanasseite was given by Allman and Lohse (Neues Jahrb. Mineral. Monatsch., p. 161-168, 1966) to a com- F. Gregorio, P. Lattanzi, G. Tanelli, and F. Vurro (1979) Garavel- pound formed by the alteration of koenenite. It has now been lite, FeSbBiS4, a new mineral from the Cu-Fe deposit of Valle found in drill cores penetrating iron-ore skarns of the Kapaev ex- del Frigido in the Apuane Alps, northern Tuscany, Italy. Min- eral. Mag., 43, 99-102. Mineral marked with asterisks have been approved before * publication by the Commission on New Minerals and Mineral Garavellite was recognized in polished sections as small aggre- Names of the International Mineralogical Association. gates, up to 200 /Lm across, of anhedral crystals, usually in contact 0003-004X/79/1 I 12-1329$00.50 1329 ------ 1330 NEW MINERAL NAMES with tetrahedrite, Sb-rich bismuthinite, chalcopyrite, and side- susceptibility of 7.072 X 1O-6mm3/g. H = 3:t:. Under the polariz- rite. Microprobe analysis led to the empirical formula ing microscope the mineral is yellowish brown or greenish yellow, Feo.8oCIlo.02SbLI3Bio.78ASo.oIS4on the basis of S = 4, or ideally isotropic with n = 2.262-2.315. Some grains show weak bire- FeSbBiS4. Garavellite is orthorhombic, a = 11.439, b = 14.093, c fringence. = 3.754A, Z = 4, G (calc) = 5.64. Strongest lines in the X-ray Jixianite was found as a secondary mineral, closely associated powder pattern (39 tabulated and indexed) are 3.62(vs)(230,011), with bismuthite and stolzite in the oxidized zone of hypothermal 3.12(vs)(121), 2.98(s)(240,330), 2.89(s)(221), 2.63(vs)(311,23 I), to mesothermal tungsten-bearing quartz veins located near the 2.5 I(vs)(250, 141). In reffected light garavellite is gray with a southern boundary of the inner contact zone of the Pan-shan por- brown-olive tint similar to tetrahedrite. Bireffectance is distinct phyritic quartz monzonite stock, in Jixian (Ji County), Hebei, and anisotropism is strong, from yellowish-green to bluish-gray. China. The primary minerals in the oxidized zone are quartz, Vickers hardness (50 g load) 212-222 kg/mm2. The name is for wolframite, cassiterite, pyrite, chalcopyrite, and minor scheelite, Professor C. L. Garavelli. A.P. wulfenite, native silver, and native copper. Other secondary min- erals are sericite, goethite, and malachite. The name is for the lo- cality. The type specimen is preserved in the Geological Museum, Georgeite* State Bureau of Geology. P. J. Bridge, J. Just, and M. H. Hey (1979) Georgeite, a new Discussion (D.D.H.) amorphous copper carbonate from the Carr Boyd Mine, West- The data suggest that jixianite belongs to the pyrochlore struc- ern Australia. Mineral. Mag., 43, 97-98. tural type, although it is not a member of the pyrochlore group as defined by Hogarth (Am. Mineral., 62, 403-410, 1977). All X-ray Georgeite forms thin coatings mostly associated with malachite lines with the exception of the weak line at 1.722A are pyrochlore- and chalconatronite on partly weathered tremolite rock containing type lines. This exception, said to represent the planes 600 and disseminated copper and iron sulfides. It is light blue with a pale 442, does not belong to the pyrochlore structure and may be incor- blue streak and vitreous to earthy luster, soft, and G = 2.55; trans- rectly indexed or belong to an impurity. All spacings appear to parent to sub-opaque (aggregates), n(NaD) = 1.593, isotropic. have been calculated using FeKa wavelengths, regardless of Georgeite is amorphous to X-rays and electron beam. Chemical whether they belong to a or f3 spectra. The number of significant microanalysis gave CuO 54.9, ZnO 0.4, Na20 2.7, C02 20.8, H20 figures in the formula, unit cell, and specific gravity (Gladstone- 21.7, sum 100.5%. After deduction of all Na20 and corresponding Dale) calculations is, in each case, unjustified. The pyrochlore amounts of CuO, C02, and H20 as chalconatronite (12.35 wt%), structure implies complete disorder amongst the A ions and vacant the atomic ratios correspond to (Cus.oZno.os)(C03h(OH)4.12 . A positions; the formulae are conventionally calculated with re- 6.3H20, the ideal formula being CUs(C03MOH)4' 6H20. The spect to B ions. The formula of jixianite can therefore be given as: name is for George Herbert Payne, past Chief of the Mineral Divi- (PbL,4Feij1i7Cu0.02h:_1.23(WL43Fet+S4MgO.03h-2.00 06(OH)o.72' sion, Western Australian Government Chemical Laboratories.
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