-- ---.-- American Mineralogist. Volume 69. pages 8/0-8/5. /984 NEW MINERAL NAMES* PETE J. DUNN, MICHAEL FLEISCHER, CARL A. FRANCIS, RICHARD H. LANGLEY, STEPHEN A. KISSIN, JAMES E. SHIGLEY, DAVID A. VANKO, AND JANET A. ZILCZER Aschamalmite* 016' 7.01 H20. The ideal formula is CaMn~+ Si3 0'6' 7H20. W. G. Mumme, G. Niedermayr, P. R. Kelly, and W. H. Paar Mn valence assigned on the basis of the Gladstone-Dale relation- ship and the red color of the crystals. Bostwickite is readily (1983) Aschamalmite, Pbs.92Bi2.()6S9,from Untersulzbach Val- ley in Salzburg, Austria-"monoclinic heyrovskyite". Neues soluble in I: I HCI. It does not belong to any known mineral family. Jahrb. Mineral., Monat., 433-444. Bostwickite crystals are not suitable for single crystal X-ray Microprobe analysis yielded Pb 62.95, Bi 22.56, and S 14.89, study. The strongest lines (19 given) in the unindexed powder sum 100.4%, which gives an empirical formula (on the basis of S pattern are: 11.3(100), 3.548(30), 2,898(30), 2.567(40), 2.262(25), = 9) Pbs.89Bi2.osS9' The normalized empirical formula (on the and 2.238(25). D meas. 2.93. basis of S = 8.96 to maintain charge balance for the given metal Bostwickite was found at Franklin, New Jersey in 1874 as content) is Pbs.nBi2.06S9. Single-crystal Weissenberg X-ray data divergent sprays of bladed crystals about 250 iLm in length. It is from a small prismatic crystal showed it to be monoclinic, space optically biaxial negative, 2V" = 25°, ex= 1.775(5), {3= 1.798(3), group C2/m, Cm, or C2, with a 13.71, b = 4.09, c 1.800(3); strong dispersion r < v; strongly pleochroic X y = = 31.43A. {3 'Y= = = 91.0°, V = 1762.13A3. The strongest X-ray lines (32 given) are = red-brown, Z = yellow-brown; absorption X = Y> Z. Optical 3.426(100)(208), 3.378(88)(208), 2.941(54)(117), 2.926(54)(313), orientation described only relative to crystal shape: Zlllength, >11 2.861(48)(20,10), and 3.525(42)(114). width, XIIthin dimension of laths. H approximately I. The mineral occurs as lead-gray, lath-like crystals to 5 em in The name honors Richard C. Bostwick, a collector of Franklin length or thick, slightly bent plates up to I cm2. Most crystals are minerals. Type specimens are preserved in the collections of heavily altered to a mixture of bismutite and other as yet Harvard University and the United States National Museum unidentified phases. Exsolution lamellae of galena and cosalite (Smithsonian Institution). are commonly present. Luster metallic, cleavage (001) perfect. D Discussion: The optical data imply that the mineral is ortho- 7.33 derived from the normalized empirical formula. Creamy rhombic. C.A.F. white in reflected light without discernible pleochroism in air. Moderately anisotropic gray to red-brown. Hardness (VHN2s) = 150-181 kg/mm2. Reflectance in air (nm,%) 470, 45.1-48.1; 546. 43.4-46.3; 589, 42.9-46.3; 650, 42.9-46.3. Clinokurchatovite* Aschamalmite is found in mineralized, alpine-cleft veins cut- S. V. Malinko and N. N. Pertsev (1983) Clinokurchatovite, a ting through gneiss near Ascham Aim in the Untersulzbach new structural modification of kurchatovite. Zapiski Vses. Valley associated with quartz, albite, adularia, calcite, chlorite, Mineralog. Obshch., 112,483-487. and galena. It is closely related to heyrovskyite and several other Analyses of several grains of the mineral by electron micro- natural and synthetic phases in the Bi2S3-PbS system. It is not probe showed variable composition CaO 32.29-32.5, MgO thought to be a dimorph of heyrovskyite because the latter is (by difference always Ag-substituted. 21.21-22.6, MnO 0.4-1.82, FeO 6.16-8.2, B203 from 100%) 37.1-38.52, sum 100.00%. The ideal formula is The name is for the locality. Type material is in the Museum of Ca(Mg,Fe,Mn)B20s. Analyses of kurchatovite are given for Natural History in Vienna, Austria, and at the Division of comparison. Mineral Chemistry, CSIRO,Port Melbourne, Victoria, Australia. X-ray study shows the mineral to be monoclinic, unit cell a = J.E.S. 12.19:t0.07A, b = 1O.95:t0.05A, c = 5.59:t0.02A. The strongest lines (49 given) are 3.093(80)(230), 3.045(100)(221), 2.799(100) (102); 2.586(50)(231), 2.027(50)(312), I. 937(80)(042), Bostwickite* 1.236(50)(572). P. J. Dunn and P. B. Leavens (1983) Bostwickite, a new calcium The mineral occurs as a modification of earlier formed kurcha- manganese silicate hydrate from Franklin, New Jersey. Miner- tovite, and forms poly synthetically-twinned crystals several al. Mag., 47 387-389. tenths to 2 mm in size. It is associated with kurchatovite, suanite, ludwigite, szaibelyite, magnetite, pyroxene, harkerite, An electron microprobe analysis gave MgO 0.9, CaO 5.1, sakhaite, calcite, vesuvianite, cIinohumite, svabite and sphaler- Mn203 56.3, Fe203 0.5, Ah03 1.0, As205 1.0, Si02 20.1, H20 15.1 (by difference), sum 100 wt.% leading to the empirical formula ite in borate-bearing rocks in a number of areas. H 4.5. D 3.07- 3.08 (hydrostatic suspension). Optically biaxial, ns ex = 1.642- (Cao. 76Mgo. '9ho. 95(M n~797F e~+Osh:6.02(Sh. 8oAlo. '6A Sl,+07h:3 .03 1.644, {3= 1.674-1.675, 'Y= 1.699-1.704 (all :to.002), 2V = 82- 88° meas., [010] f\ Z = 52°, [010] f\ Y = 38°, [100] f\ Z = 26°, [100] f\ * Minerals marked with asterisks were approved before publica- Y = 64°. tion by the Commission on New Minerals and Mineral Names of Samples of cIinokurchatovite are at the Mineralogical Muse- the International Mineralogical Association. um, Acad. Sci. USSR, Moscow. D.A.V. 0003-004X/84/0708-081 0$0.50 810 NEW MINERAL NAMES 811 Daqingshanite* 5.29(100)(111), 4.47(30)(111,200,211), 3.452(30)(112), 3.277(40)(012,320,2TT), 3.213(30)(130). R. Yingchen, X. Lulu, and P. Zhizhong (1983) Daqingshanite, a Ferrostrunzite occurs as flattened prisms to 0.5 mm that are new mineral recently discovered in China. Geochemistry elongated parallel to [00 I] and are flattened parallel to the (China), 2, 180-184 (in English). pinacoid {loo}. Light brown color and streak. H (est.) about 4. D Analysis by wet chemical (?) methods and gas chromatogra- calc. 2.57, meas. 2.50. Very brittle. Luster vitreous. Cleavages: phy gave BaO 15.98, SrO 26.10, CaO 6.17, MnO 0.02, MgO 0.72, parallel to the length of the crystal; a second perpendicular to the RE oxides 20.736, Th02 0.04, Ah03 0.18, Fe203 0.21, P20S optic normal; and a third perpendicular to Bxa. Optically biaxial (-), 2V 11.73, C02 16.19, K20 0.03, Na20 0.13, H20+ 0.68, F 0.80, sum = 80(5t, a = 1.628(2), (3 = 1.682(calc.), 'Y= 1.723(4), 99.716 - (O-Fz) = 99.376%. This corresponds to an empirical ZI\C = 3_4°. Dispersion moderate and asymmetric. Absorption formula of (Sr..s3Cao.67Bao.63Mgo..INao.o3h.97(REo.76Alo.oz minimum parallel to Z. Pleochroism X = faint yellow-green, Z = FeJ:1iz)O.80(P04>"OO(C03h.Z3«OH)o.46FO.Z6UO.07)O.79, or ideally (Sr, faint red-yellow. Ca,Bah RE(P04)(C03h..(OH,F)y where Sr > Ca, Baand OH > F, Ferrostrunzite is found as radiating sprays of fibrous prismatic y and x = = 0.8. The rare earth oxides were LaZ03 7.88, Ce203 crystals encrusting rockbridgeite which has replaced fossil bel- 10.16, Pr601l 0.70, Ndz03 1.59, SmZ03 0.106, EU203 0.02, Gdz03 emnites. These fossils occur in Cretaceous sediments along 0.12, Tb407 0.05, DYZ03 0.03, HoZ03 0.03, ErZ03 0.01, Tmz03 Raccoon Creek near Mullica Hill. The mineral is named for its 0.01, Ybz03 0.02, and LUZ03 0.01. isostructural relationship with strunzite and its unique chemis- X-ray study (Weissenberg, oscillating crystal) shows the min- try. Samples are preserved at the Smithsonian Institution in erai to be trigonal with a rhombohedral lattice, space group R3m, Washington. J.E.S. R3m, or R32. Unit-cell parameters (hexagonal orientation) a = 10.058(3), C = 9.225(3)A, V = 808.2026A3, Z = 3, and (rhombo- hedral orientation) aR = 6.570(3)A, aR = 99.87(3t, V = 269.34A3. Hingganite-(Yb )* Strongest powder diffraction lines (for FeKa; 25 given) are 3.95(60)(2021), 3.16(100)(2022), 2.52(70)(2240), 2.11(50)(3033), A. V. Voloshin, Va. A. Pakhomovskii, Yu. P. Men'shikov, A. S. 2.04(60)(2024), 1.941(60)(2423). Unit-cell parameters confirmed Povarennyk, E. N. Matvinenko, and O. V. Yakubovich (1983) by both diffraction and single-crystal methods. Hingganite-(Yb), a new mineral from amazonite pegmatites of Daqingshanite occurs as small, rhombohedral crystals with the Kola Peninsula, Doklady Akad. Nauk S.S.S.R. 270, 1188- rounded edges about 0.05 mm in size. Color pale yellow, luster 1192 (in Russian). greasy-glassy, streak white, cleavage {lOTI} perfect, conchoidal Electron microprobe analyses of hingganite and hingganite- fracture. Microhardness VHN20 335, D calc. 3.71, meas. 3.81. (Yb) gave, respectively, YZ03 24.83, 8.56 ; Yb203 17.02,34.07 ; Optically uniaxial (-), E = 1.609, W = 1.708, colorless in thin ErZ03 6.47, 8.22; DYz03 2.13, 2.47; LUZ03 1.87,4.50; Tmz031.38, section, non-fluorescent in UV light.