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New Mineral Names American Mineralogist, Volume 86, pages 197–200, 2001 NEW MINERAL NAMES JOHN L. JAMBOR1 AND ANDREW C. ROBERTS2 1Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada 2Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada 3 Biehlite* (285–304), nonfluorescent, Dmeas = 3.62, Dcalc = 3.70 g/cm for J. Schlüter, K.-H. Klaska, G. Adiwidjaja, K. Friese, G. Gebhard the empirical formula and Z = 2. Optically uniaxial, positive elongation, ω = 1.745(5), ε = 1.765(5). Electron microprobe (2000) Biehlite, (Sb,As)2MoO6, a new mineral from Tsumeb, Namibia. Neues Jahrb. Mineral. Mon., 234–240. analysis gave BaO 43.29, Mn2O3 19.57, Fe2O3 2.09, Al2O3 1.02, SiO2 26.18, Cl 3.93, O ≡ Cl 0.89, sum 95.19 wt%, correspond- ing to Ba3.93(Mn3.45Fe0.36Al0.28)Σ4.09Si6.06H6.06O24.46Cl1.54, simplified Electron microprobe analysis gave Sb2O3 60.99, MoO3 as Ba4Mn4Si6(O,OH,Cl)26. Single-crystal X-ray structure study 33.76, As2O3 4.95, sum 99.70 wt%, corresponding to 3+ 6+ (R = 0.050) indicated tetragonal symmetry, space group I4/ (Sb1.79As0.21)Mo1.00O6.00. The mineral occurs as white fibers and felty aggregates. The fibers are elongate [001], up to 1 cm long, mmm, a = 14.223(6), c = 6.141(4) Å as refined from a Guinier α but are only a few micrometers in diameter. Translucent, silky pattern (CuK radiation) in which the strongest lines (Iobs, Icalc) luster, soft, flexible, white streak, nonfluorescent, resistant to are 10.15(M,88,110), 4.417(M,49,211), 3.319(S,75,321), 3.01(VS,100,411), 2.619(S,74,222), and 2.577(M,62,501). dilute HCl but rapidly soluble in concentrated HCl, Dcalc = 5.23 g/cm3 for Z = 4. Single-crystal X-ray structure study (R = 0.065) The mineral occurs at the Cerchiara manganese (braunite) mine, indicated monoclinic symmetry, space group C2/c, a = 18.076(5), Val di Vara, eastern Liguria, Italy. The new name refers to the type b = 5.920(5), c = 5.083(5) Å, β = 96.97(1)º. Strongest lines of locality. Type material is in the Dipartimento per Studio del the powder pattern (diffractometer, CuKα radiation) are Territorio e delle sue Risorse, Università di Genova, Italy. J.L.J. – 5.622(65,110), 3.376(30,311), 3.104(61,311), 2.990(100,600), 2.960(100,020), and 2.104(42,620). The mineral is associated with anglesite and wulfenite on a fine-grained Cu ore in the Henrymeyerite* oxidation zone of the Tsumeb mine, Tsumeb, Namibia. The new mineral name is for mineralogist Friedrich Karl Bielh (b. R.H. Mitchell, V.N. Yakovenchuk, A.R. Chakhmouradian, P.C. 1887), who was the first to do scientific work on the mineral- Burns, Y.A. Pakhomovsky (2000) Henrymeyerite, a new ogy of the Tsumeb deposit. Type material is in the Mineralogi- hollandite-type Ba–Fe titanate from the Kovdor complex, cal Museum of the University of Hamburg, Germany. J.L.J. Russia. Can. Mineral., 38, 617–626. Electron microprobe analysis gave BaO 18.25, TiO2 67.78, FeO 9.20, Nb2O5 1.00, Ce2O3 0.56, La2O3 0.50, Na2O 0.40, SiO2 Cerchiaraite* 0.37, K2O 0.05, CaO 0.02, sum 98.13 wt%, corresponding to 2+ R. Basso, G. Lucchetti, L. Zefiro, A. Palenzona (2000) (Ba0.96Na0.10K0.01REE0.05)Σ1.12(Ti6.82Fe1.03Nb0.06Si0.04)Σ7.95O16, simpli- 2+ Cerchiaraite, a new natural Ba–Mn–mixed-anion silicate fied as BaFe Ti7O16. The mineral occurs as black, acicular crys- µ chloride from the Cerchiara mine, northern Apennines, Italy. tals, up to 200 m long and several tens of micrometers in Neues Jahrb. Mineral. Mon., 373–384. thickness, with probable forms {100}, {110}, and {101}. Opaque, adamantine luster, brittle, reddish brown streak, Hest = 5–6, Dmeas 3 The mineral occurs as individual grains and radial aggre- = 4.0(1), Dcalc = 4.20(1) g/cm . Grayish brown in reflected light, gates with quartz, pectolite, orientite, and calcite in fractures weak brownish bireflectance; reflectance percentages (SiC stan- that are up to a few millimeters in width. Individual grains are dard, air) are given in 20 nm steps from 420 to 720 nm; repre- prismatic to acicular, up to 0.1 mm wide and 2 mm long, elon- sentative values for Rω and Rε are 12.2, 13.4 (440), 11.9, 12.8 gate [001], and the aggregates are up to 3 mm in diameter. Deep (480), 11.6, 12.6 (540), 11.4, 12.7 (580), and 11.3, 13.8 (660). green color, transparent, vitreous luster, brittle, pale green Single-crystal X-ray structure study (R = 0.027) indicated tet- ragonal symmetry, space group I4/m, a = 10.219(3), c = 2.963(1) Å. streak, uneven fracture, no cleavage or parting, VHN50 = 296 The Ba and vacancies in the tunnels in the structure are com- pletely disordered, thus differing from the ‘Ba-Ti hollandite’ that occurs in the Tian Shan Mountains (Am. Mineral., 79, p. 188). An X-ray powder pattern was unobtainable; strongest lines of the calculated pattern are 3.232(100,310,130), 2.486(34,211,121), 2.236(40,301), 1.901(31,411,141), 1.598(33,521,251), *Before publication, minerals marked with an asterisk were 1.405(26,541,451), and strongest lines for a synthetic sample approved by the Commission on New Minerals and Mineral are 3.19(100), 2.227(40), 1.891(29), and 1.587(31). Names, International Mineralogical Association. The mineral is associated with dolomite, fluorapatite, tetra- 0003-004X/01/0102–197$05.00 197 198 JAMBOR ET AL: NEW MINERAL NAMES ferriphlogopite, rimkorolgite, catapleiite, collinsite, and pyrite on {001}. Translucent, vitreous to resinous luster, light brown in a single vug in a carbonatite vein, 20 to 30 cm wide, at the streak, H = 2–3, fragile, perfect {001} cleavage, nonfluorescent, 3 Kovdor alkaline ultramafic complex, Kola Peninsula, Russia. soluble in HCl, Dmeas = 3.0(1), Dcalc = 2.92(2) g/cm for Z = 1. The new name is for Prof. Henry O.A. Meyer (1937–1995). Optically uniaxial negative, ω = 1.750, ε not determinable, Type material is in the Geological Museum of the Kola Sci- strongly pleochroic, O = brown, E = light brown-yellow. Elec- ence Center in Apatity, Russia. J.L.J. tron microprobe analysis gave CaO 13.68, CuO 2.04, FeO 27.25, SiO2 1.27, As2O5 30.03, H2O by difference 25.73, sum 100 wt%, corresponding to (Ca3.69Cu0.39)Σ4.08Fe5.74(As3.97Si0.32)Σ4.29 O16.3(OH)8.17·17.53H2O, ideally (Ca,Cu)4Fe6[(As,Si)O4]4 Niobokupletskite* (OH)8·18H2O. The X-ray powder pattern (114 mm Gandolfi, CuKα radiation) is similar to that of wallkilldellite, and by anal- P.C. Piilonen, A.E. Lalonde, A.M. McDonald, R.A. Gault (2000) ogy a = 6.548(5), c = 23.21(2) Å, hexagonal, space group Niobokupletskite, a new astrophyllite-group mineral from – P6 /mmc, P6 mc, or P62c. Strongest lines are 11.600(100,002), Mont Saint-Hilaire, Quebec, Canada: description and crys- 3 3 5.670(80,100), 3.275(70,110), 2.760(15,202), and 1.641(25,307). tal structure. Can. Mineral., 38, 627–639. The mineral, which is the Fe analog of wallkilldellite, oc- The holotype occurs as anhedral to subhedral, platy to tabu- curs as an oxidation product at the Roua mine and at another lar, light beige to yellow epitaxic overgrowths, to >0.5 × 0.2 nearby deposit. Among the associated minerals are cuprite, mm, on kupletskite. Habits observed for other grains are com- native copper and silver, algodonite, domeykite, koutekite, ol- pact fibrous, light yellow-brown overgrowth on coarse-grained ivenite, kolfanite, janggunite, and malachite. The type mate- kupletskite, and very fine-grained, sheaf-like aggregates of sil- rial from Roua is in the Muséum d’Histoire naturelle de Genève very brown acicular crystals. Vitreous luster, brittle, uneven to in Geneva, Switzerland. splintery fracture, perfect {001} cleavage, H = 3–4, Dicussion. According to J.D. Grice, Chairman of the 3 CNMMN, the name approved by the CNMMN is wallkilldellite- nonfluorescent, Dmeas = >3.325, Dcalc = 3.46 g/cm for Z = 1. (Fe) rather than wallkilldellite-Fe. J.L.J. Optically biaxial positive, α = 1.718(1), β = 1.733(1), γcalc = 1.750, 2Vmeas = 87(2)°, Z = c, X and Y in the (001) plane; pleo- chroism X ≈ Y = light yellow-orange, Z = red-brown. The aver- age of three electron microprobe analyses listed for the holotype Titanium is Na2O 2.62, K2O 5.97, Rb2O 0.82, Cs2O 0.12, MgO 0.15, MnO 26.37, FeO 2.64, ZnO 4.08, Al2O3 1.14, TiO2 1.34, ZrO2 3.43, Jing Chen, Jiliang Lee, Jun Wu (2000) Native titanium inclu- Nb2O5 12.13, Ta2O5 0.63, SiO2 31.85, F 0.14, H2O (calc) 2.48, sions in the coesite eclogites from Dabieshan, China. Earth O ≡ F 0.06, sum 95.85 wt%, corresponding to (K1.84Rb0.13Cs0.01)Σ1.98 Planet. Sci. Lett., 177, 237–240. Na0.95(Mn5.40Zn0.73Fe0.53Na0.28Mg0.05) Σ 6.99(Nb1.33Zr0.40 Ti0.24Ta0.04) Σ2.01(Si7.71Al0.32) Σ8.03O 26(OH)4.00(O0.89F0.11) Σ1.00, The mineral occurs as inclusions, ~10 µm, in garnet from a ideally K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F).
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