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New Mineral Names* American Mineralogist, Volume 64, pages 652-659, 1979 NEW MINERAL NAMES* MICHAEL FLEISCHER, G. Y. CHAO AND J. A. MANDARINO Aleksite* Electron microprobe analyses, with pure Au, Ag, Cu, Fe, Te, A. G. Lipovetskii, Yu. S. Borodaev, and E. N. Zav'yalov (1978) and Se, and chemically analyzed altaite, clausthalite, and chalcopy- Aleksite, PbBi,Te,S" a new mineral. Zap. Vses. Mineral. rite as standards, of 8 spots from 2 samples from Far Eastern Obshch.. 107, 315-321 (in Russian). USSR gave Au 40.7-50.5, av 48.4; Ag 0.63-3.05, avo 1.54; Cu 7.43- 11.8, avo 9.35; Fe 0.13,0.36, avo 0.19; Pb 16.7-22.5, avo 19.2, Te Electron microprobe analyses of 2 samples gave Pb 20.3,20.5; Bi 18.5-22.9, avo 21.6; Se 0-1.35, avo 0.34; sum 99.4,101.7, avo 100.6%, 46.0,45.5; Te 27.3,27.3; S 6.3, 6.3; Ag, Sb, Se not found, sum 99.9, giving the formula (Au,..oAgo.17 )(Cu1."Feo.o4)Pbl.lo(Te,.ooSeo.o5)' 99.6, corresponding to Pbo."Bi,.l1Te,.o8S1.8. and Pbo..5Bi2.1oTe,.o8 X-ray study gave 12 lines, the strongest being 2.37( 10)(III), S1.8.' 2.05(7)(200), 1.448(6)(220), and 1.232(8)(311). The pattern is simi- The X-ray pattern (55 lines given) (Fe radiation, Mn filter) has lar to that of gold with primitive pseudocubic cell a = 4.IOA. strongest lines 3.09(10)(0.1.1.14), 2.25(4)(1.0.1.28), 2.12(6) (1110), The mineral occurs in the zone of weathering of telluride depos- 1.348(4)( 1.2.3.14), 1.307(4)( I. I.1.48). This indicates a cell with its of the Far Eastern USSR and Kazakhstan, associated with a = 4.238, c = 79.76A, Z = 6, G calc 7.80. tellurides of Au, Cu, Pb, and Fe, as rims on Au, and replacing The mineral occurs as platy grains up to I mm in sulfide-quartz sylvanite and krennerite. It had previously been called rickardite, veins at Alekseev mine, Sutamskii region, Stanovoi Range, USSR, which it resembles in optical properties. with galena, gold, altaite, tetradymite, rucklidgeite, and other tell- The color is light brown, rose-brown, luster semi-metallic, streak urides. Cleavage perfect, {0001}. Hardness (20 g load), avo of 6, = gold-brown to brown. No cleavages. It polishes well and easily. In 51:1:8 kg/sq mm. Relief low, polishes well. In reflected light pale reflected light, blue-violet to beige-cream. Reflectances are given at gray with slight greenish tint, weakly anisotropic. Reflectivity is 15 wavelengths with Rg and Rp, respectively, for 2 samples: 460 given at 15 wave lengths. Rg = 460, 51.4; 540,53.2; 580, 53.4; 640, nm, 13.4-14.5, 10.2-10.7; 540 nm, 21.5-23.2, 4.5-6.8; 580 nm, 54.2%. 25.0,28.1,6.1-12.0; 640 nm, 23.9-30.7, 8.5-36.5%; the optical sign The name is for the mine. Type material is preserved at the changes at 620 nm. Hardness (load 20 g) 329-419, avo 381 kg/sq Moscow Gosudarst University. M.F. nm. The name is for the Soviet geologist Yuri A. Bilibin (1901-1952). Type material is preserved in the Mineralogical Museum, Acad. Altmarkite, unnamed Hg-Pb analgam Sci. USSR, Moscow, and at IMGRE,Moscow. M.F. T. Kaemmel, E. P. Muller, L. Krossner, J. Nebel, H. Unger, and H. Ungethum (1977) Altmarkite, a new mineral (preliminary report). Z. angew. Geol., 23, 535-536 (in German). Canavesite* Metallic deposits on installations of the natural gas plant at G. Ferraris, M. Franchini-Angela, and P. Orlandi (1978) Can- Altmark, East Germany, contained Hg and Pb. HgPb" containing avesite, a new carboborate mineral from Brosso, Italy. Can. Hg 27-36, Pb 73-64 atomic percent, has strongest X-ray lines 2.78, Mineral., 16, 69-73. 2.49, 1.67 A, corresponding to synthetic tetragonal HgPb, with a = The mineral occurs as milky-white rosette-like aggregates of fi- 2.52, c = 4.53A, G = 12.1, H = 2, silver-white to gray. It is named bers (~Imm long) on ludwigite and magnetite skarns in the iron altmarkite for the locality. Also present is an unnamed Hg-Pb mine of Brosso, Province of Torino, Piedmont, Italy. The slightly amalgam, Hg 20, Pb 80 atomic percent, cubic, Fm3m, a = 4.87A, flexible fibers are very thin and elongated parallel to [010], have strongest lines 2.80, 2.43, 1.73A, G 11.8. = vitreous luster, and do not fluoresce under ultraviolet light. G meas Discussion about 1.8, calc 1.79. Very rare crystals show pseudohexagonal Data inadequate. It is not clear whether the material is of natural prismatic habit. One or more {hO/} cleavages or partings were ), 2 V is very large, Z b, a 1.485(4), (3 origin or an artefact. M.F. observed. It is biaxial( + = = 1.505(2), dispersion very weak. = 1.494(4), 'Y = Canavesite is monoclinic with a space group having a diffraction Bilibinskite* symbol 2ImP-I-. The X-ray powder diffraction pattern was in- 23.49(2), b 6.164(6), c 21.91(2)A, (3 E. M. Spiridonov, M. S. Bezsmertnaya, T. N. Chileva, and V. V. dexed using a = = = = Bezsmertny (1978) Bilibinskite, Au,Cu,PbTe" a new mineral of 114.91(9)°. The strongest lines (average for FeKa and CuKa) are: gold-telluride deposits. Zap. Vses. Mineral. Obshch., 107, 310- 9.54( 100)(202), 8.12(40)(201),7.80(18)(102,301),4.56(21) (501,503), 315 (in Russian). and 3.110(19)(407). Chemical analyses (two complete and one partial) gave the following average values: MgO 31.60, B,O, 12.70, CO, 18.57, H,O *Minerals marked with asterisks were approved before pub- 37.44, total 100.31 wt.%. On the basis of eleven oxygen ions, the lication by the Commission on New Minerals and Mineral Names empirical formula calculated from these data is Mg,.o,(CO,)1.o. of the International Mineralogical Association. (HBO,)o..4.4.9IH,O or, ideally, Mg(CO,)(HBO,).5H,O. 0003-004X/7910506-0652$00.50 652 NEW MINERAL NAMES 653 The name is for the district, Canavese, in which the village and Color green, H = 3, brittle. In thin section rich green. Under the mine of Brosso occur. Type material is deposited in the Museo microscope a good cleavage on {021) and a poor one {IOI}. Opti- Civico di Storia Naturale di Milano. Some "nesquehonite" col- cally biaxial, positive, ns (Na, 22°C) a = 1.880, {3= 1.928, I' = lected from this locality since 1973 is in reality canavesite. J.A.M. 2.029 (all :1:0.008), 2V = 72° (calc), X = a. Pleochroic with X pale bluish-green, Y rich yellow-green, 2 deep emerald green, abs. 2 ~ Y » X. Dispersion moderate, r > v. Cernyite* The mineral occurs in crystals up to 0.5 mm elongated on a, with S. A. Kissin, D. R. Owens, and W. L. Roberts (1978) Cernyite, a terminations showing d{ 103} and n{ 180}. It occurs in veins of the copper-cadmium-tin sulfide with the stannite structure. Can. Bambollita mine near Moctezuma, Sonora, Mexico, associated Mineral., 16, 139-146. with electrum, teineite, and carlfriesite. The name is for Fabian Cesbron, French mineralogist. Type Cernyite (CHA.RNI. AIT) is a rare constituent of two complex, material is at the British Museum of Natural History, London, and zoned pegmatites in the Tanco mine, Bernic Lake, Manitoba, and at the University of Paris. M.F. the Hugo mine, Keystone, South Dakota. It occurs as small grains (up to 200l'm) intergrown with kesterite. Associated minerals are stannite and various other sulfides. It is steel gray, luster metallic, Donnayite* streak black. H is about 4; no cleavages or crystal forms were observed. Density could not be measured; calculated density for G. Y. Chao, P. R. Mainwaring, and J. Baker (1978) Donnayite, Tanco and Hugo mine specimens is 4.776 and 4.618 g/cm', respec- NaCaSr, Y(CO,).. 3H20, a new mineral from Mont St. Hilaire, tively. The microindentation hardness (VHN,o) is 189 for Tanco Quebec. Can. Mineral., 16, 335-340. material and 210 for Hugo material. In reflected light (in air), This mineral formerly designated "UK33" occurs in small quan- cernyite is medium gray and is not readily distinguished from tities in the pegmatite dikes, miarolitic cavities, and interstices in kesterite. Bireflectance is imperceptible, and anisotropy is very the nepheline syenite at Mont St. Hilaire, Quebec. Associated weak, in shades of gray. Under oil, cernyite is distinctly bireflectant minerals are microcline, analcime, natrolite, calcite, chlorite, aegi- from creamy gray with a yellowish tint to very light gray and is rine, arfvedsonite, siderite, rhodochrosite, ancylite, pyrite, sphaler- anisotropic in shades of gray. Reflectance values (Tanco and ite, hematite, goethite, pyrophanite, catapleiite, gaidonnayite, and Hugo) are: 470nm (24.6 and 25.5), 546nm (23.4 and 25.6), 589nm astrophyllite. Donnayite is commonly in syntactic intergrowths (22.3 and 25.0), and 650nm (22.7 and 24.3). with ewaldite, a Sr-analog of ewaldite, mckelveyite, and rarely 2, a = The mineral is tetragonal, space group 142m, 2 = 5.5330 synchysite. The crystals are usually small, from 0.05 to 1.0mm, and c = 1O.8266A (Tanco), a = 5.4871 and c = 1O.845A (Hugo).
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