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New Mineral Names* American Mineralogist, Volume 73, pages 927-935, 1988 NEW MINERAL NAMES* JOHN L. JAMBOR CANMET, 555 Booth Street, Ottawa, Ontario KIA OGI, Canada KENNETH W. BLADH Department of Geology, Wittenberg University, P.O. Box 720, Springfield, Ohio 45501, U.S.A. T. SCOTT ERCIT, JOEL D. GRICE Mineral Sciences Division, National Museum of Natural Sciences, Ottawa, Ontario KIA OMS, Canada EDWARD S. GREW Department of Geological Sciences, University of Maine, Orono, Maine 04469, U.S.A. AtIasovite* and Bi. As in the case with nabokoite, there is a discrepancy V.I. Popova, V.A. Popov, N.S. Rudashevskiy, S.F. Glavatskikh, between the measured and calculated densities and a large spread V.O. Polyakov, A.F. Bushsmakin (1987) Nabokoite of values for Zn, Pb, Te, K, and S among the microprobe analyses, CU7TeO.(SO.),' KCI and atlasovite Cu6Fe3+Bi3+0.(SO.),' KCI. which were simply averaged. Moreover, in the X-ray powder New minerals of volcanic exhalations. Zapiski Vses. Miner- pattern, there is an intense peak at 10.75 A that is not accounted alog. Obshch., 116, 358-367 (in Russian). for; a peak also occurs at 10.64 A in the pattern for nabokoite. E.S.G. An average of four electron-microprobe analyses at three dif- ferent laboratories using different standards gave Cu 30.48, Zn 0.82, Pb 2.04, Te 1.03, Fe 4.38, Bi 11.50, K 3.20, V 0.46, Cs 0.01, S 12.90, CI 2.92, <? 30.26 (by difference, to sum 100 wt%), Carbonate-vishnevite and hydroxyl vishnevite corresponding to (Cu,..OZnO.15)'6.0'(FeO..7VO.llh 1.0.(Bio.6.Pbo.12- Ye.1. Semyonov, A.P. Khomyakov, G.Ye. Cherepivskaya, N.G. TeO.IO)ro..0(SO.)...,O..I.'Kl.oICll.o1 for 0 + CI = 25. The ideal for- U gryumova (1984) Sodian cancrinites of the Lovozero alkaline mula is Cu.Fe3+Bi'+O.(SO.),' KCI. No water was found. The min- massif. Mineralog. Zhurnal, 6, 50-54 (in Russian). erai forms an isomorphous series with nabokoite in which Fe3+ and Bi3+ substitute for Cu and Te. Insoluble in water but soluble Four analyses of carbonate-vishnevite gave Si02 43.62, 43.11, in HCI and HN03; reacts with KOH, Clerici solution, and im- 39.38,38.87; A1203 24.57, 24.42, 26.19, 27.48; Fe203 0.38, 0.33, mersion oils of high refractive index. 0.84,0.61; MnO -, -,0.07,0.09; MgO 0.12, 0.11, 0.50, 0.08; By analogy with nabokoite (which see), atlasovite is presumed CaO 0.50,0.68,2.11, 1.32; Na20 20.91,21.30,22.79,23.58; to be tetragonal, space group P4/ncc. The unit cell from powder K20 0.40, 0.10, 0.37, 0.11; C02 4.04, 4.82,5.72,3.56; S03 -, data is a = 9.86(2), c = 20.58(2) A, Z = 4. Six of the strongest 0.36,0.44,0.50; H20 5.80, 5.01, 2.46, 4.51; sums 100.34, 100.24, lines taken with unfiltered Fe radiation (66 a and (3lines given) 100.37, 100.21 wt%. The first two analyses approximate are 10.41(100)(002),4.57(50)(014), 3.57(40)(024), 3.431(70)(006), N a7AI,Si702.C03. 2. 5 H20; the second two approximate 2.890(70)(224), 2.446(80)(226). A line at 10.75(90) was not in- Na.(AISiO.)6C03' H20. dexed. Powder X-ray study of carbonate-vishnevite yields a = 12.582(4), c = Atlasovite occurs as tabular crystals showing the forms {OOI}, 5.105(2) A; space group could not be determined {110}, {O12}, and {O14}; the crystals may consist predominantly unambiguously, and splitting of several lines indicates that the of atlasovite, or atlasovite may occur as zones within nabokoite. unit cell could be a multiple of the above values. The mineral is Atlasovite is dark brown, transparent, with a vitreous luster and uniaxial and, as a rule, negative with n = I 512 n . = I 490 iln = 0.022. Density 2.39 to 2.46 glcm37a~olor'vari~bknfro~ pal~ light brown streak. Perfect {OOI}cleavage, H = 2 to 2.5, Dme.. = 4.20(5) glcm3 (by suspension in Clerici solution), Deale= 4.12 lilac and light blue to dark gray and black, the last attributed to included organic matter. glcm3. Optically uniaxial negative, w = 1.783(3), f = 1.776(3) (white light), dichroic with 0 = red brown and E = yellowish. Carbonate-vishnevite occurs in poikilitic aegirine-nepheline- In reflected light, light gray with yellow internal reflections. sodalite syenites and associated pegmatites and hydrothermalites The mineral is a sublimate from the Great Clefted Talbachik of the Karnasurt and Alluayv Mountains and the River Chin- volcanic eruption, Kamchatka, USSR. The name is for the Rus- glusuay (Kola Peninsula). The mineral occurs as veinlets I to 3 sian explorer Vladimir Vasil'yevich Atlasov (circa 1661-1664 to cm thick, as prismatic crystals in cavities, and as irregular gran- 1711). A sample (as zones in nabokoite) is preserved in the Fers- ular aggregates that locally are replacements of sodalite. man Mineralogical Museum of the USSR Academy of Sciences, Analysis of hydroxyl vishnevite gave Si02 36.32, AI203 31.15, Moscow. Fe203 0.18, MnO 0.03, MgO 0.11, CaO 0.92, Na20 23.43, K,O Discussion. The proposed formula needs further substantita- 0.45, C02 1.59, H20 5.41, sum 99.59 wt%, approximating tion. No evidence is given to support the valences assigned to Fe Na.(AISiO.MOH).H20. Powder X-ray study gave a = 12.731(4), c = 5.180(2) A, space group as P632. Refractive indices are 1.50 I and 1.494. D = 2.32 glcm3. Color light blue. The mineral occurs Minerals marked with an asterisk were approved before pub- in the Karnasurt Mountains; the mode of occurrence is not spec- * lication by the Commission on New Minerals and Mineral Names, ified, but presumably it is the same as for carbonate-vishnevite. International Mineralogical Association. Discussion. In terms of chemical composition, the two minerals 0003-004X/88/0708-0927$02.00 927 928 NEW MINERAL NAMES described here are not any closer to type vishnevite than to two are calcite, aragonite, gypsum, barite, celestite, various zeolites, other members of the cancrinite group, cancrinite and sacrofan- and whewellite. Hannebachite is thought to be primary in origin. ite. Thus the terms carbonate-vishnevite and hydroxyl vishnevite Type material is in the Naturhistorisches Museum Mainz, Fed- are misleading. The names have not been submitted to the IMA eral Republic of Germany. J.L.J. commission for appraisal. E.S.G. J ohninnesite* Diomignite* P.1. Dunn, D.R. Peacor, S.-c. Su, J.A. Nelen, O. von Knorring D. London, M.E. Zolensky, E. Roedder (1987) Diomignite: nat- (1986) Johninnesite, a new sodium manganese arsenosilicate ural Li2B40, from the Tanco pegmatite, Bernie Lake, Mani- from the Kombat mine, Namibia. Mineral. Mag., 50, 667- toba. Can. Mineral., 25,173-180. 670. The mineral occurs as a clear, colorless daughter mineral, up Electron-microprobe analysis gave Si02 35.5, FeO 0.1, MgO to 30 /-Lmin maximum dimension, in fluid inclusions in spod- 8.2, MnO 40.7, As20, 10.6, Na20 3.1, H20 (Penfield method) umene. The grains are euhedral to anhedral, commonly pseu- 2.6, sum 100.8 wt%, corresponding to Na,.o.Mg.2oFeo.o,Mnll.8'- dorhombohedral to pseudocubic, the appearance derived from ASI.9oSi12.1804,.2,(OH),.9" ideally Na2Mg.MnI2As,si12043(OH).. The tetragonal forms {IOO}and {III}. No twinning or cleavage ob- analytical total and calculations of Gladstone-Dale values require served. A Gandolfi X-ray pattern (57.3-mm camera, Cu radia- that Mn is divalent and As pentavalent. The mineral occurs as tion) gave tetragonal cell dimensions of a = 9.470(4), e = 10.279(5) light yellowish-brown, friable, acicular aggregates, elongate [001] A, and strongest powder-diffraction lines of 4.07(100)(112), and up to 4.5 em long, with a vitreous luster, light brownish- 3.495(50)(022), 2.662(60)(123), 2.587(40)(132), 2.045(40)(322); yellow streak, and indeterminate hardness; good {I OO}and poor {OIO} cleavages. 3.48(4), Doak = the results are in excellent agreement with data for synthetic Dm'.' = 3.51 glcm' for Z = 1. Li2B40" space group 14Jed, Z = 8, Deal, = 2.437 glcm'. The Optically biaxial negative with 2 V = 41.9(2)°, 2 Voak= 40.9°, a = 1.6742(4), (3 1.6968(3), mineral is uniaxial negative, with a refractive index of about 1.6 = 'Y = 1.6999(3) for Na light; r > v and birefringence of about 0.05; synthetic Li2B40, is uniaxial distinct. Single-crystal study indicated triclinic symmetry, PI or negative, w = 1.612(1), < = 1.554(2), birefringence 0.058(4). En- PI. Cell dimensions refined from a Gandolfi X-ray powder pat- ergy-dispersion spectroscopic analysis of diomignite crystals con- tern (114.6-mm camera, Fe radiation) are a = 10.44(2), b = firmed that elements with an atomic number> II were absent; 11.064(6), e = 9.62(1) A, a = 107.43(7), (3= 82.7(1), 'Y= 111.6(1)°. thermometric properties of the inclusions also are consistent with Strongest lines of the powder pattern are 9.8(60)(010), Li2B40, behavior. 5.99(40)(110), 3.38(40)(121, etc.), 3.23(60)(320,300,013), The new name is derived from Homeric Greek dios mignen 2.676(100),2.479(40), 1.539(40).
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