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New Mineral Names* American Mineralogist, Volume 78, pages 1314-1319, 1993 NEW MINERAL NAMES* JOHN L. JAMBOR Department of Earth Sciences, University of Waterloo, Waterloo, Ontario N2L 3G 1, Canada DAVID A. VANKO Department of Geology, Georgia State University, Atlanta, Georgia 30303, U.S.A. Bearthite* Cancrisilite* C. Chopin, F. Brunet, W. Gebert, O. Medenbach, E. Till- A.P. Khomyakov, E.I. Semenov, E.A. Pobedimskaya, manns (1993) Bearthite, Ca2AI[P04]2(OH), a new min- T.N. Nadezhina, R.K. Rastsvetaeva (1991) Cancrisilite eral from high-pressure terranes of the western Alps. Na7[AIsSi7024]C03 .3H20: A new mineral of the can- Schweiz. Mineral. Petrogr. Mitt., 73, 1-9. crinite group. Zapiski Vses. Mineral. Obshch., 120(6), 80-84 (in Russian). Electron microprobe analyses of the holotype sample from the Monte Rosa massif, Zermatt Valley, Switzer- The reported chemical composition is Na20 21.30, K20 land, gave CaO 33.04, srO 3.53, MgO 0.12, FeO 0.03, 0.10, CaO 0.68, MnO 0.11, Fe203 0.33, Al203 24.42, Si02 Al203 15.91, Ce203 0.04, La203 0.03, Si02 0.30, P20S 43.11, C02 4.82, S03 0.36, H20 5.01, sum 100.24 wt°jo, 44.32, S03 0.01, F 0.48, CI 0.02, sum (less 0 == F, CI) corresponding to (Na6.89Ko.o2Cao.12Feo.o4Mgo.o3)~7.2o(AI4.8o- 97.62 wt°jo, corresponding to (Ca3. 74Sr O.22)~3.96(AI1.98- Si7.2o)~12.oo024.lo(C03)I.IO(S04)o.o4.2.79H20, ideally Na7AIs- Mgo.o2)~2.oo(P3.97Sio.o3)~4.ooFo.16'close to the ideal formula Si7024C03 .3H20. Dissolves readily with effervescence at Ca2AI[P04h(OH), with OH confirmed by structural re- room temperature in 100joHCI, HN03, and H2S04. Sin- finement. Other analyses indicate appreciable Ca + Al ~ gle-crystal X-ray study showed the mineral to be hexag- REE + Mg substitution. Occurs as yellowish aggregates, onal, space group P63mc, unit cell a = 12.575(3), c = up to millimeter size, of partly euhedral, flat prismatic 5.105(2) A. The powder pattern resembles that of can- crystals and as smaller anhedral grains corroded by laz- crinite, though the symmetry is higher (cancrinite has ulite in concordant quartz segregations in gneiss and schist. space group P63). The strongest lines (27 given) are Also present as a rock-forming accessory in pyrope-phen- 6.30(70,110),4.61(50,101), 3.65(90,300), 3.22(100,211), gite quartzite and in coesite-bearing metapelite in the Dora and 2.722(50,400). Occurs as anhedral lilac-colored grains Maira massif, western Alps, Italy. Yellowish color, white 1-3 mm across, varying from water-clear to turbid, vit- streak, possibly one poor prismatic cleavage, uneven frac- reous luster, conchoidal fracture, colorless in thin section, ture, H = <5, soluble in HCI, Deale= 3.25 glcm3 with Z white streak, brittle, H = 5, Dmeas= 2.40(2), Deale= 2.39 = 2. Colorless and transparent in thin section, biaxial glcm3 with Z = 1. Optically uniaxial negative, w = positive, a = 1.662(1), (j 1.671(1), 1.696(1),2 Vmeas 1.509(2), E = 1.490(2). Luminesces yellow in UV light, = 'Y = = 65.0(3)°, Xllb, distinct dispersion r < v. Single-crystal similar to feldspars containing S2- or SO~-. The IR spec- X-ray structure study (R = 0.058) gave monoclinic sym- trum has minima at 425, 455, 493, 573, 620, 686, 858, metry, space group P21/m, a = 7.231(3), b = 5.734(2), c 980, 1120, 1453, 1560, 1620, and 3580 cm-I. The min- = 8.263(4) A, {j = 112.57(8)0. Strongest lines of the X-ray eral occurs in hyperalkalic pegmatites of the Lovozero powder pattern (114-mm Gandolfi camera, CuKa ra- alkalic massif, which also contain potassium feldspar, diation, calculated intensities) are 4.58(22,011), nepheline, arfvedsonite, aegirine, and 27 other listed mi- 3.05(100,211), 2.867(61,020), 2.754(27,103), 2.634- nor minerals. The name refers to the anomalously high (21,120), 2.568(39,112), and 2.444(19,211). Synthesized Si/ Al ratio for a cancrinite-group mineral. Type material as flat prismatic crystals up to 150 ~m. is at the Fersman Mineralogical Museum, Moscow, and The new name is for P. Bearth (1902-1989) in recog- at the Vernadskii Geological Museum, Moscow. D.A.V. nition of his pioneering petrographic work on the high- pressure terranes of the western Alps. Textural relation- ships suggest that bearthite formed during the early high- Guarinoite*, theresemagnanite* pressure stages of Alpine metamorphism. Type material H. Sarp (1993) Guarinoite (Zn,Co,Ni)6(S04) (OH,Cl)10 . is in the Mineralogisch-Petrographisches Institut, Uni- 5H20 and theresemagnanite (Co,Zn,Ni)6(S04)(OH,Cl)10 . versity of Basel, Switzerland, and at the Musee de Mi- 8H20, two new minerals from the Cap Garonne mine, neralogie, Ecole des Mines de Paris, and the Museum Var, France. Archives des Sciences, 46(1), 37-44 (in d'Histoire naturelle, Paris. J .L.J. French, English abs.). Guarinoite Before publication, minerals marked with an asterisk were approved* by the Commission on New Minerals and Mineral Electron microprobe and CHN analyses gave ZnO Names, International Mineralogical Association. 33.31, CoO 22.17, NiO 6.74, CuO 0.05, S03 11.85, CI 0003-004X/93/1112-1314$02.00 1314 JAMBOR AND VANKO: NEW MINERAL NAMES 1315 0.77, H20 24.4, 0 == CI 0.17, sum 99.12 wt°jo, corre- Si5.97)2;12024(OH)1.23(C03)o.36.2.35H20, ideally Nas[AI6- sponding to (Zn2.99C02.16Nio.66)2;S.81(S04)1.0SClo.16(OH)9.30. Si6024](OH)2.2H20.The IR spectrum shows peaks at 1375 5.23H20, ideally (Zn,Co,Ni)6(S04)(OH,CI)10. 5H20. and 1460 cm -1 due to carbonate. The mineral dissolves Occurs as bright to deep pink aggregates or rounded ag- easily at room temperature in HCI, HN03, and H2S04' gregates to 0.3 mm of thin hexagonal crystals up to 0.04 with slight effervescence. Single-crystal X-ray study gave x 0.2 mm, tabular {001}. Transparent, vitreous to pearly trigonal symmetry, space group P3, a = 12.740(3), c = luster, light pink streak, irregular fracture, perfect {001} 5.182(2) A. Strongest lines (27 given) of the powder pat- cleavage, soft, nonfluorescent, soluble in HCI, Dmeas= 2.80, tern are 6.43(25,110), 4.70(60,101), 3.68(70,300), Deale= 2.77(1) glcm3 with Z = 3. Optically uniaxial neg- 3.26(100,211), 2.756(50,400), and 2.433(30,401). Occurs ative, w = 1.584(2), E= 1.544(2), strongly pleochroic with in massive aggregates 10-15 mm across; blue color, vit- o = pink, E = light pink. Single-crystal X-ray study in- reous luster, steplike fracture, H = 6, brittle, white streak, dicated hexagonal symmetry, space group P63, P63/m, or perfect {I OO}cleavage, Dmeas= 2.32(2), Deale= 2.26 gm/ P6322, a = 8.344(4), c = 21.59(2) A. Strongest lines of cm3 with Z = 1, nonfluorescent. Transparent and color- the powder pattern (114-mm Gandolfi, CuKa radiation) less in thin section, .optically uniaxial positive, w = are 10.8(100,002), 3.300(90,114), 2.725(60,120,116), 1.494(2), E= 1.501(2). 2.563(50,123),2.351(40,302,207), and 1.575(30,411). The mineral occurs in veins 1-5 cm wide in ultra-al- The new name is for Andre Guarino, mineral collector. kalic pegmatites of the Lovozero massif, Kola Peninsula, Type material is in the Mineralogy Department of the associated with natrolite, steenstrupine, vuonnemite, Natural History Museum, Geneva, Switzerland. epistolite, mountainite, ilmajokite, and nastrophite. As with the synthetic analogue, the mineral is thought to Theresemagnanite form from alkalic fluids that are impoverished in Ca and Electron microprobe and CHN analyses gave CoO C03. The name is for the chemical composition. Type 32.95, ZnO 20.42, NiO 3.18, CuO 0.16, S03 10.54, CI material is at the Fersman Mineralogical Museum, Mos- 5.65, H20 28.40, 0 ==CI 1.28, sum 100.02 wt°jo, corre- cow, and the Vernadskii Museum, Moscow. D.A.V. sponding to (C03.47Zn1.9sNio.34Cuo.02)2;5.s1(S04) 1.04(OH)S.29- CI1.25.8.3H20, ideally (Co, Zn,Ni)6(S04)(OH,CI)1O. 8H20. Occurs as pink to light pink, thin platy crystals, tabular Manaksite* {001}, making up radiating spherules to 0.2 mm. Crystals are transparent, pearly luster, light pink streak, perfect A.P. Khomyakov, T.A. Kurova, G.N. Nechelyustov {001} cleavage, irregular fracture, soft, nonfluorescent, (1992) Manaksite NaKMnSi401O: A new mineral. Zapi- ski Vsese Mineral. Obshch., 121(1), 112-114 (in Rus- soluble in HCI, Dmeas= 2.52(2), Deale= 2.48(1) glcm3 with sian). Z = 3. Optically uniaxial negative, w = 1.568(2), E = 1.542(2), strongly pleochroic with 0 = pink, E = light Analysis by electron microprobe (average of three) gave pink to colorless. A Laue pattern indicated hexagonal Na20 8.9, K20 10.8, srO 0.2, CaO 0.2, MgO 0.3, MnO symmetry, a = 8.363(8), c = 26.18(17) A as derived from 17.2, FeO 0.8, Si02 62.0, sum 100.4 wt°jo, corresponding a Gandolfi pattern (114 mm, CuKa radiation) with to (Na1.11 ~.89Cao.0l)~2.01 SrO.01 (Mno.94Feo.o3)21O.97M&>.03Si3.9901O, strongest lines of 13.1(100,002), 3.523(30,114), ideally NaKMnSi401O.
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