American Mineralogist, Volume 81, pages 1282-1286, 1996 NEW MINERAL NAMES* Jonx L. J.lvrnonor Yraonvnn A. Kovar,BNKER2 Jacm Puzrnwtcz,3 lr.ro Axonrw C. Ronnnrsa lDepartment of Earth Sciences,University of Waterloo, Waterloo, Ontario N2L 3Gl, Canada '?IGREM RAN, Russian Academy of Sciences,Moscow 10917, Staromonetnii 35, Russia 3lnstitute of Geological Sciences,University of Wroclaw, Cybulskiego 30, 50-205 Wroclaw, Poland aGeologicalSurvey of Canada, 601 Booth Street,Ottawa KIA 088, Canada Clinoatacamite* mineral from the Clear Creek claim, San Benito Coun- ty, California: Description and crystal structure. Pow- J.L. Jambor,J.E. Dutrizac,A.C. Roberts,J.D. Grice,J.T. der Diffraction, I l(l), 45-50. Szymariski(1996) Clinoatacamite, a new polymorph of Cur(OH),CI, and its relationship to paratacamite and The mineral occurs sparinglywith calomel, native mer- "anarakite." Can. Mineral., 34, 6l-7 2. cury, cinnabar, montroydite, and quartz in a single spec- J.D. Grice, J.T. Szymafiski,J.L. Jambor (1996)The crys- imen of float near a prospectpit at the former Clear Creek tal structure of clinoatacamite, a new polymorph of mercury mine in the new Idria district of California. The Cur(OH)rCl. Can. Mineral., 34, 7 3-7 8. specimen contains subhedral to anhedral crystals, typi- Electron microprobe analysis gave CuO 74.7 (73.4- cally bladed to platy, maximum size 0.3 x 0.3 mm, stri- 76.0),Cl16.5(15.7-17.2),HrO (calc.) 13.5, sum 104.7, ated [001], black to dark brown-black color, dark red- less O = Cl 3.7, total 101.0 wt0/0,corresponding to brown to black streak, opaque to translucent on thin Cu,.ruOrorHr,,Clonr,ideally Cur(OH)rCl. The morphol- edges,metallic luster, brittle, uneven fracture, good {001} ogy is variable, from simple twinned pseudorhombo- cleavage,H : <5, nonfluorescenl,Dur":9.51 g/cm3for hedral grains up to I mm across, to complicated inter- Z : 4, decrepitateson exposureto sunlight. Electron mi- growths of euhedra. Varicolored from green to dark croprobe analysisgave HgO 96.2, Cl 3.3, O = Cl 0.75, greenishblack, less commonly greenishblue; vitreous to sum 98.79 wto/o;the recalculated empirical formula on adamantine luster, transparentto translucent,brittle with the basis of the crystal-structure determination is Hgljo- an even fracture, nonfluorescent,cleavage {012} perfect, Hgiso[Cl,..r(OH)o,,]"rooO, oo. Bright bluish white to duller twinned on {100}, H : 3, D.,,.(idealized): 3.77 g/cm3 grayish white in reflected light, bireflectant and slightly for Z :4. Optically biaxial negative,nonpleochroic,2V^* pleochroic, straight extinction; reflectancepercentages in : 75(5), 2Vurc: 69(3)'; strongdispersion, r << v; orien- air and in oil are given in 20 nm steps from 400 to 700 tation X: b, Y:a: l0'in obtuseangle B. Single-crystal nm. Single-crystalX-ray structure study (R : 0.152) in- X-ray structure study (R : 0.052) indicated monoclinic dicated orthorhombic symmetry, spacegroup Pbma, a: symmetry,space group P2r/n, a: 6.157(2),b: 6.814(3), I1.790(3),b: 13.881(4),c:6.450(D Aas refinedfrom c:9.10a(5) A, p:99.65(4) asrefined from l14 mm a I 14 mm Debye-Scherrerpowder pattem (Cu radiation, Debye-Scherrer(CoKa,) powder data; strongestlines are 55 lines listed) with strongest lines of 5.25(80,lll), 5.4 7( l 00,T0l .0| t), 2.767 (60,2 I I ), 2.742(7 0,0 | 3,202), 3.164(60,231), 3.053(100,041), 2.954(7 0,t4t), 2.681- 2.266(60,220), 2.243(50,004),and 1.704(50,224,040). (50,40I ), arrd2.4 | | (50,232,34 l). Reliably distinguished from paratacamiteonly by optical The new name is for J.D. Hanawalt (1903-1987), a or X-ray study. pioneer in the field of X-ray powder diffraction. Type The mineral has been found on specimensfrom several material is in the SystematicReference Series of the Na- localities worldwide. On the type specimen, from Chu- tional Mineral Collection at the Geological Survey of quicamata, Chile, the mineral is associatedwith atacam- Canada, Ottawa. J.L.J. ite, paratacamite, gypsum, and alunite on a quartzose matrix. The new name alludes to the monoclinic sym- metry and polymorphic relationship to atacamite. Type Jensenite* material is in the Royal Ontario Museum, Toronto. A.C.R. A.C. Roberts,J.D. Grice, L.A. Groat, A.J. Criddle, R.A. Gault, R.C. Erd, E.A. Moffatt (1996) Jensenite, Hanawaltite* CurTe6*Ou.2HrO,a new mineral speciesfrom the Cen- tennial Eureka mine, Tintic district, Juab County, Utah. A.C. Roberts,J.D. Grice, R.A. Gault, A.J. Criddle, R.C. Can. Mineral., 34, 49-54. Erd (l 996)Hanawaltite, Hg|+Hg,+[Cl,(OH)]rO,-A new J.D. Grice, L.A. Groat, A.C. Roberts(1996) Jensenite, a cupric tellurate framework structure with two coordi- nations of copper.Can. Mineral., 34, 55-59. * Before publication, minerals marked with an asterisk were approved by the Commission on New Minerals and Mineral Electron microprobe analysis gave CuO 50.91, ZnO Names, International Mineralogical Association. 0.31,TeO, 38.91,HrO (calc.)8.00, sum 98.13wt0/0, cor- 0003-004x/96109l 0- I 282$05.00 r282 JAMBOR ET AL.: NEW MINERAL NAMES r283 respondingto (CurnrZnoor)rrroTefS,O, nr'2.03HrO. An IR Discussion.For reports of AgFeS, as an unnamed min- spectrum confirmed the presenceof structurally bound eral, seeAm. Mineral.,73, p. 1497 (1988);75, p. 435 HrO, and the formula was obtained by X-ray crystal- (1990);80, p. 186(1995). V.A.K. structure analysis (R* : 0.025). The mineral occurs as emerald-green,transparent, single crystals(up to 0.4 mm long) and groups of crystals on white to colorless quartz. Magnesiocoulsonite* Green streak, fair {T0l} cleavage,brittle, H : 3-4, w- L.Z. Reznitskii, E.V. Sklyarov, Z.F. Ushchapovskaya even fracture, adamantine luster, nonfluorescent, D-r": (1995) Magnesiocoulsonite-A new mineral speciesin 4.78 g/cm3for Z:4. Crystalsare mainly simplerhombs, the spinel group. Zapiski Vseross. Mineral. Obshch., someslightly elongate [l01], showing{l0l}, {ll0}, mi- 124(4),9 l-97 (in Russian). nor { 100}, and severalsmaller forms. Weakly bireflectant Electron microprobe analyses(extremes of ten listed) plane-polar- and nonpleochroic in reflectedlight; gray in gaveTiO, 0.12,0.16,A11030.35, 0.41, VrO3 46.68, 55'88, ized light in air; anisotropy not detectable.Single-crystal CrrOr 3l.72, 21.49,FeO 0.07,0.61, MnO 0.19,0.19, group X-ray study indicated monoclinic symmetry, space MgO 20.94,21.03,sum 99.87,99.'7'7wt0/0, corresponding : : : P2,/n, a: 9.204(2),b 9.170(2),c 7.584(\ A, 0 to Mg(V,Cr)rOo, with 59-72 molo/oMgVrOo. Occurs as powder pattern (l14 102.32(3)',as refined from a mm black, irregular grains up to 0.25 mm; black streak, me- Debye-Scherrer, Cu radiation) with strongest lines of tallic luster, uneven fracture, brittle, Hrco: 969 (873- 6.428(I 00,T0l, I I 0), 3.2| 7(7 0,202), 2.60(60,202), 1080)kelmm2 (Mohs 6.5), insolublein HCI and HNO.. 2.5 30(5 0,230), 2.1 44(3 5,33 I ), and | .750(3 5,432). Light gray in reflected light, isotropic, no internal reflec- The mineral is associatedwith mcalpineite, xocome- tion. Reflectance measurements for grains containing catlite, and several unnamed Cu- and Te-bearing min- 50.2-51.9 Mo/oVrO, gave (nm, Rolo):400, 14.3; 420, 14.2; erals that occur in dumps at the Centennial Eureka mine. 440,14.1; 460, 14.0;480, 13.9; 500, 13.8; 520, 13.8; 540, (b. The new name is for M.C. Jensen 1959),who first 13.7: 560, 13.7; 580, 13.7; 600, 13.7; 620, 13.7',640, recognizedthe mineral. Type material is in the National 13.7;660,13.8;680, 13.8;700, 13.7.The X-raypowder Mineral Collection at the Geological Survey of Canada, pattern of a grain containing 48.7 wto/oVrO, was indexed Ottawa. J.L.J. by analogy with magnesiochromite and MgVrO-.. Iso- metric symmetry, spacegroup Fd3m, a : 8.385 A, D-" : g,/cm3 : Strongestlines of the powder Lenaite* 4.31 for Z 8. pattern are 4.84(90,I I I ), 2.52( I 00,3| l), 2.093(80,400), V.A. Amuzinsky, Yu.Ya. Zhadov, N.V. Zayakina, N.V. 1.6l2(80,5 I l), and 1.582(90,440). Leskova (1995) Lenaite AgFeSr-A new mineral spe- The mineral occurs in quartz-diopside rocks of the cies.Zapiski Vseross.Mineral. Obshch.,124(5), 85-91 Slyudyanka complex, southern Baikal region, Siberia, (in Russian, English abs.). Russia, in associationwith Cr- and V-bearing tremolite, The mineral occurs as xenomorphic or equant grains, diopside,chlorite, and muscovite,and with calcite, quartz, to 0.2 mm, in goethite pseudomorphs after magnesian goldmanite, pyrite, karelianite and chromian karelianite, siderite. Electron microprobe analysis of 22 grains gave Cr-V spinels, and unnamed Mg(Cr,V)oOr. The name al- an averageand rangeof Ag 46.58 (44.9-47.3),Fe 24.08 ludes to the composition and the relationship to coulson- (23.'7-24.5),S 28.86(28.0-30.6), Hg 0.3 (0.0-0.4),sum ite, FeVrO4. Type material is at the Fersman Mineral- 99. 8 (98. 8- I 0 I .5) wt0/0,corresponding to AgonrFeo nrS, oo, ogical Museum, Moscow, Russia. J.P. ideally AgFeSr. Megascopiccolor not observed,metallic luster,opaqul, H : 4.5, VHNrc: 310 (270-360),D*'" : : 4.63 g/cm3 for Z 4.