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American Mineralogist, Volume 84, pages 990–994, 1999 NEW MINERAL NAMES* JOHN L. JAMBOR1 AND ANDREW C. ROBERTS2 1Department of Earth Sciences, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada 2Geological Survey of Canada, 601 Booth Street, Ottawa K1A 0E8, Canada Blatonite* Gd2O3 0.9, Dy2O3 4.4, Er2O3 3.9, Yb2O3 2.7, (Tb2O3 0.32, Ho2O3 1.15, Tm2O3 0.51, Lu2O3 0.35 estimated), SiO2 40.0, R. Vochten, M. Deliens (1998) Blatonite, UO2CO3·H2O, a new uranyl carbonate monohydrate from San Juan County, Utah. H2O 5.87 by difference, sum 100 wt%, corresponding to ⋅ Can. Mineral., 36, 1077–1081. (Ca1.21Na0.89Mn0.13)Σ2.22(Y2.16REE0.68)Σ2.84Si5.98O18 2.9H2O. The min- eral occurs typically in anhedral, heterogeneous masses, 1–2 cm Electron microprobe and thermogravimetric analyses gave across, of eutectoid-like intergrowths with quartz. White to creamy color, vitreous luster, white streak, brittle, uneven frac- UO3 81.98, CO2 12.82, H2O 5.38, sum 100.18 wt%, correspond- ture, H = 5, elongate [010], typically in divergent bundles ~100 ing to (UO2)0.99(CO3)1.00⋅1.03H2O. The presence of CO3 groups µ µ 3 and H O was confirmed by infrared spectroscopy. The mineral m long and 20 m wide, Dcalc = 3.46 g/cm for Z = 1. Optically 2 α β γ occurs as canary-yellow, needle-shaped, subparallel fibers that biaxial negative, = 1.602(1), = 1.607(2), = 1.611(1), 2Vmeas ° ° ∧ ° are in bundles up to 0.1 mm wide and 1 mm long. Silky luster, = 73(3) , 2Vcalc = 83 , X b = 7 . Single-crystal X-ray structure white streak, translucent, H = 2–3, parting along the fibers, study (R = 0.052) indicated triclinic symmetry, space group P1; α β uneven fracture, flexible, D = 4.05(2), D = 4.02 g/cm3 for a = 9.245(5), b = 9.684(6), c = 5.510(3) Å, = 97.44(6), = meas calc γ ° Z = 36, fluoresces strongly greenish yellow at 360 nm, soluble 100.40(6), = 116.70(6) as refined from a powder pattern (114 α with effervescence in dilute mineral acids and in acetic acid. mm Gandolfi, CuK radiation) with strongest lines of 8.44(80,010),3.76(70,1–21–,021–), 2.973(100,3–10,021) and Optically uniaxial positive, length fast, nonpleochroic, ω = – – 1.588(2), ε = 1.612(2). The Guinier–Hägg X-ray powder pat- 2,930(60,131). The mineral occurs in pegmatite-aplite at the Strange Lake tern (CuKα1 radiation; 14 lines listed) has strongest lines at 7.86(47,110), 6.91(55,103), 6.56(77,201), 4.76(40,114), and complex on the Quebec–Labrador boundary, 250 km north- 3.056(100,207); calculated a = 15.79(1), c = 23.93(3) Å, hex- east of Schefferville, Quebec. Associated minerals are quartz, agonal or trigonal symmetry. hematite, kainosite-(Y), gittinsite, leifite, and several others. The mineral occurs in seams of gypsum in siltstone within Also present is a gadolinite-group mineral for which six listed the Triassic Shinarump Conglomerate at the Jomac uranium electron microprobe analyses are thought to correspond to the mine, San Juan Country, Utah. Associated minerals are general formula (Ca,Y)2Si2Be2(O,OH)10. Type material of boltwoodite, coconinoite, metazeunerite, rutherfordine, azur- gerenite-(Y) is in the Systematic Reference Series at the Geo- ite, malachite, carbonate-cyanotrichite, brochantite, and smith- logical Survey of Canada, Ottawa. The new mineral name rec- sonite. The new name is for N. Blaton (b. 1945), crystallogra- ognizes R. Geren (b. 1917) for his contribution to the discov- pher at the University of Leuven, Belgium. Type material is in ery of the Strange Lake Y-REE-Nb-Zr-Be deposit. J.L.J. the Royal Belgian Institute of Natural History, Brussels. J.L.J. Graeserite* Gerenite-(Y)* M.S. Krzemnicki, E. Reusser (1998) Graeserite, Fe4Ti3AsO13(OH), J.L. Jambor, A.C. Roberts, J.D. Grice, T.C. Birkett, L.A. Groat, S. a new mineral species of the derbylite group from the Monte Leone nappe, Binntal region, Western Alps, Switzerland. Can. Zajac (1998) Gerenite-(Y), (Ca,Na)2(Y,REE)3Si6O18·2H2O, a new mineral species, and an associated Y-bearing gadolinite- Mineral., 36, 1083–1088. group mineral, from the Strange Lake peralkaline complex, 2+ Quebec–Labrador. Can. Mineral., 36, 793–800. P. Berlepsch, T. Armbruster (1998) The crystal structure of Pb - bearing graeserite, Pb0.14(Fe,Ti)7AsO12+x(OH)2-x, a mineral of L.A. Groat (1998) The crystal structure of gerenite-(Y), the derbylite group. Schweiz. Mineral. Petrogr. Mitt., 78, 1–9. (Ca,Na)2(Y,REE)3Si6O18·2H2O, a cyclosilicate mineral. Can. Mineral., 36, 801–808. Electron microprobe analysis gave TiO2 40.89, Fe2O3 33.64, FeOcalc 3.94, PbO 5.00, As2O3 13.51, Sb2O3 1.43, H2O (calc.) 1.30, 3+ 2+ One of several electron microprobe analyses listed gave sum 99.80 wt%, corresponding to (Fe 2.91Fe0.38Ti0.54Pb0.15)∑3.98 3+ 3+ Ti3(As 0.94Sb0.07)∑1.01O13(OH). Occurs as black, opaque, acicular Na2O 3.1, CaO 7.6, MnO 1.0, Y2O3 27.4, Nd2O3 0.2, Sm2O3 0.2, [001] crystals, >10 µm thick and up to 5 mm long, and as radial *Before publication, minerals marked with an asterisk were aggregates. Black streak, metallic luster, ductile, moderate {100} approved by the Commission on New Minerals and Mineral cleavage, conchoidal fracture, possibly twinned along the elon- 1 3 Names, International Mineralogical Association. gation, VHN25 = 521 (Mohs 5 ⁄2), Dcalc = 4.56 g/cm for Z = 2. 0003-004X/99/0506–0990$05.00 990 JAMBOR AND ROBERTS: NEW MINERAL NAMES 991 Grayish white in reflected light, no pleochroism or bireflectance. Oenite Reflectance percentages are given in steps of 20 nm from 400 to The most Co-rich of 17 electron microprobe analyses listed 700 nm; representative values for R1 and R2 in air (SiC standard) gave Co 19.9, Fe 0.8, Ni 2.3, Sb 51.0, As 25.9, S 0.5, sum are 20.1, 20.8 (460), 19.6, 20.3 (480), 18.7, 19.3 (540), 18.2, 100.4 wt%, corresponding to (Co0.86Ni0.10Fe0.04)Σ1.00Sb1.00 18.9 (580), and 17.5, 18.1 (660). Single-crystal X-ray study in- (As0.89Sb0.07S0.04) Σ1.00. Occurs as polycrystalline anhedral aggre- dicated monoclinic symmetry, space group A2/m, a = 7.184(2), gates up to 300 µm across in chalcopyrite, typically along con- β ° b = 14.289(6), c = 5.006(2) Å, = 105.17(2) ; similar results tacts with cobaltite. Opaque, silver-white color, metallic lus- were obtained in the X-ray structure study (R = 0.0292), but in a ter, brittle, gray streak, uneven fracture, VHN100 = 599, Dcalc = C2/m setting. Strongest lines of the powder pattern (Debye– 7.91 g/cm3 for Z = 4. Silver-white in reflected light in air, white α Scherrer, FeK radiation) are 3.117(30,220), 2.846(80,131), with a faint yellowish or creamy tint in oil; nonpleochroic, no 2.681(100,231), 2.029(30), and 1.5825(50,351,162). bireflectance in air, weakly bireflecting and pleochroic from The mineral is associated with arsenopyrite, anatase, white to slightly darker creamy white in oil. Weakly to dis- asbecasite, cafarsite, and other rare arsenic oxides in hydro- tinctly anistropic, with reddish brown to darker pale violet ro- thermal Alpine-type fissures in paragneisses of the Monte Leone tation tints; effects are more intense in oil. Reflectance per- nappe in the Binntal region of Switzerland. The new name is centages in air (WC standard) for R1 and R2 are 58.2, 55.5 (470 for Stefan Graeser (b. 1935) of the Mineralogical–Petrographic nm), 56.8, 55.6 (546), 55.8, 55.5 (589), and 55.0, 55.5 (650). Institute, University of Basel, Switzerland. Type material is in Indexing of the X-ray powder pattern (18 lines listed; 114 mm the Natural History Museum in Basel. J.L.J. Debye–Scherrer, Fe radiation) gave an orthorhombic cell with Kalifersite* a = 3.304(6), b = 6.092(8), c = 10.258(13) Å. Strongest lines of the X-ray powder pattern are 2.63(100,022), 2.53(80,112), G. Ferraris, A.P. Khomyakov, E. Belluso, S.V. Soboleva (1998) 1.942(100,015), and 1.1182(80,137). Kalifersite, a new alkaline silicate from Kola Peninsula (Rus- The mineral occurs in chalcopyrite that replaced cobaltite and sia) based on a palygorskite-sepiolite polysomatic series. Eur. löllingite at the Tunaberg polymetallic sulfide skarns. The new J. Mineral., 10, 865–874. name, pronounced oonite, is for Soen Oen (1928–1986) to recog- nize his contributions to the geology and mineralogy of ore de- The mineral is closely associated with aegirine, fenaksite, posits. Type material is in the Instituut voor Aardwetenschappen, and pectolite in a hydrothermally altered pegmatite at the Khibina Vrije Universiteit, Amsterdam. massif, Mt. Kukisvumchorr, Kola Peninsula, Russia. Occurs as fibrous bundles up to 5 mm, elongate [001], and as aggregates (Fe,Ni)SbAs up to 1 cm in cavities. Pink-brownish color, translucent, earthy Oenite is variable in composition, with formula Co ranging to silky luster, white streak, H = 2, brittle, [001] fibrous parting, from 0.86 to 0.21, Ni from 0.06 to 0.34, and four of the listed good {100} and {010} cleavages, nonfluorescent, Dmeas= 2.37(2), analyses showing Fe predominant. The most Fe-rich sample gave 3 α Dcalc = 2.28 g/cm for Z = 1.
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