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New Mineral Names* American Mineralogist, Volume 70, pages 871-881,1985 NEW MINERAL NAMES* PETE J. DUNN, MICHAEL FLEISCHER, RICHARD H. LANGLEY, JAMES E. SHIGLEY, AND JANET A. ZILCZER Agardite-(La)*, Agardite-(Ce) :t 0.11°, Z = 2. D (calc) for the synthetic = 9.06. The strongest T. Fehr and R. Hochleitner (1984) Agardite-(La). A new mineral lines in the X-ray diffraction pattern (47 given) are: 3.05(10)(114), from Lavrion, Greece, Lapis, 1/84, 22 and 37 (in German). 2.80(7-8)(303), and 2.84(7)(210). Color is yellow brown to orange brown; powder grayish XRF-analyses indicated the occurrence of agardite-(La), Ce-rich yellow; luster nearly adamantine; transparent in fine fragments; agardite (called agardite-(Ce)) as well as mixed crystals of both. cleavage parallel to elongation; Brittle; hardness about 3; micro- Identification was confirmed through comparison with Modreski's hardness 198-245 (ave. 219) kg/sq. mm; polishes well; sections original data for type material of agardite-(La). X-ray data are become covered by a bluish or bluish-violet film. In transmitted nearly identical for all compositions. light is transparent, anisotropic from dark brown to blue-gray; Minerals occur .in the oxidation zone in the mining district of pleochroic from pale brownish-yellow to light brown, n's above Kamariza near Laurion, Greece. Both end members commonly 2.0. In reflected light, gray with bluish tint, reflectances (max. and form spherical to rosette-like aggregates (up to 3 mm dia.) of min., %): 460 nm, 22.8, 18.5; 546 nm, 20.4, 16.1; 590 nm, 19.7, needle-like crystals occurring in limonite voids. They are usually 15.8; 656 nm, 18.5, 14.5. younger than associated smithsonite, aurichalcite, hydrozincite, The mineral occurs in oxidized, complex Sb--As-Hg ores of the azurite, cuproadamite, calcite, and chrysocolla, rarely with AI- Khaidarkan deposit, Kirgiz S.S.R., associated with calomel, adamite on zincaluminite, gibbsite, etc. Color ranges from nearly eglestonite, terlinguaite, corderoite, montroydite, kuznetsovite, colorless to yellowish green to commonly intense bluish green and shakhovite, poyarkovite, and native Hg, in grains up to 0.2 mm. does not correlate with composition. The name is for the artist Lyudmila Alekseevna Chursina. Type Discussion material is at the Central Siberian Geol. Museum, Novosibirsk. M.F. The name agardite-(La) was previously approved by I.M.A. (Am. Mineral. 67, 1041 (1982)), however, a formal description has not yet been published. The name agardite-(Ce) has not been sub- Earlshannonite* mitted or approved. No quantitative data are given. V.G. D. R. Peacor, P. J. Dunn, and W. B. Simmons (1984) Earlshan- nonite, the Mn analogue of whitmoreite, from North Carolinia. Bulaiinite Can. Mineral., 22, 471-474. Microprobe analysis gave Al203 0.1, Fe203 33.8, FeO 4.6, I. V. Nikolaeva (1977) Minerals of the glauconite group in sedi- MgO 0.8, CaO 0.6, MnO 8.2, P205 30.0, H20 (by difference) 21.9, mentary formations. Novosibirsk, Nauka, p. 46; from an ab- stract in Zapiski Vses. Mineralog. Obshch., 113,379. sum 100.0%, corresponding to (Mno.55 FeO.30 Mgo.o9 Cao.o5ho.99 (Fet~o Alo.01)E2.01 (P04)2.00 (OHhol' 4.75H20, or ideally Name given to the Mg, Fe2+ end-member of the glauconite MnFe~+(p04)2(OHh' 4H20. There was inadequate material for group. The name is for the Bulaisk formation, eastern Siberia. the direct determination of water content. The oxidation state of Fe was determined on the basis of microchemical tests and on the Discussion known structural relationships of the Fe analogue, whitmoreite. This name, not having been approved by the I. M. A., has no Microprobe analysis of earlshannonite crystals from a second oc- validity. M.F. currence at Hagendorf, Germany, yielded a similar composition. X-ray study by precession and Weissenberg methods shows the mineral to be monoclinic, space group P2';c, unit cell Chursinite * a = 9.910(13), b = 9.669(8), c = 5.455(9)A, P = 93.95(9t, Z = 2. V. I. Vasil'iev, Yu, G. Lavrent'iev, and N. A. Pal'chik (1984) The strongest lines (41 given; FeKIX radiation, Si internal stan- Chursinite, (Hg2h(As04h, a new natural mercury arsenate. Za- dard) are 9.8(100)(100); 6.9(80)(110), 4.18(60)(111), 3.45(60)(220), piski Vses. Mineralog. Obshch., 113,341-347 (In Russian). 2.856(60)(221), 2.789(70)(311). The average of 6 microprobe analyses gave Hg 81.28 (:to.73), The mineral occurs as prismatic euhedral crystals up to 0.5 mm As 9.74 CtO.15), 9.57 (to.29), sum 100.59 wt.%, corresponding in length elongate on [001] with forms {110}, {loo}, and {011}. to Hg6.ooAs1.930S.96° or Hg6As~+09' However, the X-ray data They are twinned on {IOO},and typically exhibit parallel growth agree with those for synthetic (Hg2h(As04)3 (Kamener and Kait- with [001] in common. The crystals commonly form radial, hemi- ner, Acta Cryst., 29B, 1666-1669 (1973)), and this formula is ac- spherical aggregates. The mineral is reddish brown, transparent, cepted. Presumably it is Hg~+Hg~+(As04h. with a vitreous luster and brittle tenacity. It does not fluoresce in Single-crystal study showed chursinite to be monoclinic, P2';c, ultraviolet light. H 3-4. Two poor cleavages were observed on crushed grains; one is likely {loo}. Fracture even. D (heavy liquid) with a 8.71 t 0.02, b 5.08 t 0.02, C 15.66:t 0.02A, P = 128.27 = = = 2.90(4) g/cm3, 2.92 gjcm3 (calc.). Optically biaxial, negative, IX= 1.696(4), P = 1.745(4), y = 1.765(4), 2Y,.= 64(4t. Moderate ·Minerals marked with asterisks were approved before pub- pleochroism: X = Y = light yellow brown, Z = yellow brown. lication by the Commission on New Minerals and Mineral Names Absorption Z > X Y, Z = c. Crystals from Hagendorf are of the International Mineralogical Association. bright yellow. "" 0003-004X/85/0708--{)871 $02.00 871 872 NEW MINERAL NAMES Earlshannonite was found on the dumps of the Foote Mineral the melilite group. Jeffreyite is orthorhombic (although dimension- ally pseudotetragonal with a b), space group C2221, unit cell Company's spodumene mine near the town of Kings Mountain, = Cleveland County, North Carolina. The mineral was not found in a = 14.90, b = 14.90, c = 4O.41A, Z = 64. The strongest lines (62 place in the pegmatite body. Associated minerals include mitrida- given) are 5.00(40)(008,026), 2.993(90)(408), 2.774(100)(428), tite, laueite, rockbridgeite, a jahnsite-group mineral, quartz, and 2.541(60)(444,00.16),2.360(40)(620), 1.755(50)(660). an unidentified amorphous Mn oxide. The mineral is among the The mineral occurs as thin pseudotetragonal plates up to 1 mm last species to form in the sequence of late stage secondary phos- across along with colorless grossular in a cavity in a rodingitized phates. Crystals from Hagendorf occur with frondelite and rock- dike exposed in the Jeffrey open pit at Asbestos, Shipton Town- bridgeite. ship, Richmond County, Quebec, Canada. It is colorless, transpar- The mineral is named for the mineralogist and chemist Earl V. ent, and brittle, and has a micaeous appearance so that it can be Shannon (1895-1981) of the U.S. National Museum. Type materi- mistaken for a mica. Cleavages perfect: {001} and {110}. No reac- al is deposited in the Smithsonian Institution under catalogue tion to UV radiation. Not readily soluble in 20% HCI. H 5. D #NMNH 150168. J.E.s. 2.99 (hydrostatic suspension), 2.98 calculated. Optically biaxial negative, IX= 1.625, fJ = 1.641, y = 1.643, 2Y,.= 40° meas., 39° calc. Optical orientations Ylla, Xllc. Twinning on (100). Jaskolskiite* The name is for the Jeffrey mine. Type material is preserved at M. A. Zakrzewski (1984) Jask6lskiite, A new Pb-Cu-Sb-Bi sul- the National Museum of Natural Sciences, Ottawa. J.E.s. fosalt from the Vena Deposit, Sweden. Can. Mineral., 22, 481- 485. E. Makovicky, W. G. Mumme and R. Norrestam (1984) The crys- Jeppeite* tal structures of izoklakeite, dadsonite and jask6lskiite. Acta M. W. Pryce, L. C. Hodge and A. J. Criddle (1984) Jeppeite, a new Crystallogr. A40, Supplement, International Union of Crystal- K-Ba-Fe titanate from Walgidee Hills, Western Australia. Min- lography, Thirteenth International Congress, Communicated eral. Mag., 48, 263-6. Abstracts, p. C-246. A. N. Bagshaw, B. H. Doran, A. H. White and A. C. Willis (1977) Jask61skiite (ideal composition Pb2+xCux(Sb, Bih-xS3; Sb ex- Crystal structure of a natural potassium-barium hexatitanite ceeds Bi and x = 0.2) has been found in the Vena deposit, Bergsla- isostructural with KzTi6013' Aust. J. Chern., 30, 1195--1200. gen, Sweden. Microprobe analysis yield Pb 50.74, Cu 1.31, Sb Report of the Government Chemical Laboratories Western Aus- 15.74, Bi 14.35, S 17.51; sum 99.65%. This gives the formula tralia for the year 1980, p. 24. Pbz.22Cuo.19Sb 1.17Bio.6zS3' Powder and single crystal X-ray diffraction show the mineral to Jeppeite (ideal composition (K,Ba)z(Ti,Fe)6013) is found as be orthorhombic, space group Pbnm, a 11.331(1), b 19.871(2), small crystals (up to 2 x 2 mm) in a weathered lamproite at Wal- = = gidee Hills, Kimberly Division, Western Australia. The average of c = 4.100(I)A, Z = 4, D calc. = 6.47 gjcm3. The strongest X-ray lines (71 given) are 3.710(100)(310), 3.595(50)(121), 3.333(60)(131), seven microprobe analysis yields KzO 8.47, BaO 17.35, TiOz 2.970(80)(231), 2.761(60)(241), 2.751(50)(311), 2.050(50)(002).
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