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New Mineral Names* American Mineralogist, Volume 82, pages 430-433, 1997 NEW MINERAL NAMES* JonN L. Jenrnonrt Nmolar N. PnnrsBvr2 ANDANonnw C. Ronnnrs3 'Department of Earth Sciences,University of Waterloo, Waterloo, Ontario N2L 3G1, Canada '?IGREMRAN, RussianAcademy of Sciences,Moscow 10917,Staromonetnii 35, Russia rGeological Survey of Canada,601 Booth Street,Ottawa, Ontario KIA 0G1, Canada Benauite* larite group. Vestnik Moscow Univ., Ser. 4 Geol., No. K. Walenta, W.D. Birch, PJ. Dunn (1996) Benauite, a 2, 54-60 (in Russian) new mineral of the crandallite group from the Clara Flame photometry (Li,O, K,O, Na,O) and electron mi- mine in the central Black Forest. Germanv. Chem. croprobeanalyses gave SiO, 64.40,2rO, 1.55,FeO 0.45, Erde.56.I7l-176. MnO 8.78, MnrO. 1.13 (Mn'*/IMn3* from the crystal Electron microprobe analysis gave SrO 12.35, PbO sffucturedetermination), ZnO 15.51, Y,O. 1.51, Yb,O. 2.79, BaO 4.32, CaO 0.07, K,O 0.07, CuO 0.03, ZnO 0.54,K,O 6.16,Na,O 0.61,Li,O 1.10,sum 101.14wtVo, 0.07, Al,O. 0.26, Fe,O.40.85,P,O5 18.53,As,O, 0.78, corresponding to K, *(Ko.uN4,ronoro)>,.(Mnl{rMr{luYo't SO. 6.79, HrO by difference 13.09,sum 100 wtqo, cor- Zrn,rFeo, o)rr.o @nr rrLto,) t *Si,, -O.u. Occursas aggegates responding to (SrourBao,BboorCsoo,&u,)ro.€€r.Aloo.)rrn. to 40 x 50 mm, and as single grains; dark blue, dirty [(PO.),or(SOo)008(AsOo)oo"]rroo(OH,HrO)8.. Occurs as blue, or violet-brown color, translucent, vitreous luster, yellow to brown radial aggregates,up to 3 mm in diam- brittle, light blue streak, no cleavage,basal parting, Il : eter, consisting of scaly crystals flattened on (0001) and 4.5, VHN,oo: 423, D-"^": 2.96(2),D*n: 2.978 glcm' >1 mm in length. Transparentto translucent,vitreous to for Z : 2; insoluble in hot HCI but readily soluble in resinous luster, yellowish streak, brittle, perfect {0001} warm HE Optically uniaxial negative <o : 1.590, e : cleavage, conchoidal fracture, H : 3lz, D^."" = 3.65(5), 1.586; strongly pleochroic, from light blue (E) to light D."," : 3.648 g/cm3.Optically uniaxial negative or biaxial violet (O). The infrared spectmm has an intense absorp- with 2Vup to 20', e : 1.862(5),a : 1.872(5),E : nearly tion band at 1030 cm ' attributable to Si-O bonds, and a colorless, O_= yellow. Tiigonal symmetry, space group nilrow band at 795 cm' characteristicfor ring silicates. probably R3m by analogy with beudantite; 6 : 7.28(2), Single-crystalX-ray structurestudy (R : 0.036) indicated c : 16.85(4) A as calculated from an X-ray pattern (57 hexagonalsymmety, spacegroup P6/mcc, a: 10.218(4), mm, FeKa radiation)with strongestlines of 5.88(100,101), c = 14.292(3) A. The powder pattern (diffractometer, 3.06(90,11 3), 2.96(s0,r0s,2U), 2.8 1 (s0,006), 2.s3(s0,204), CuKcr radiation, 35 lines given) has strongest lines of 2.25(ffi,lU ), 1.969(50,303), and I .820 A (50,I 18,220,216).4. | 5(45,1 l2), 3.75 (5 0,202), 3.25 (100,21 1,203), and 2.5 4 5 The mineral is associatedwith fluorite, goethite, and (s2,220). kidwellite. The new name is for a locality near the Clara The mineral was found in a boulder of pegmatite in mine. Type material is in the Institut fiir Mineralogie und glacial moraine at the Dara-i-Pioz alkaline massif, Tien Kristallchemie der Universitiit Stuttgart,Germany, and in Shan, Tajikistan. The boulder consists of quartz and mi- the Museum of Victoria. Melbourne. Australia. crocline with minor aegirine, tadzhikite-(Y), cesium ku- Discussion. Although the authors give the simplified pletskite, hyalotekite, betafite, and polylithionite. The formula as SrFe.(POo),(OH,HrO)6and the mineral was new nilme is for V.D. Dusmatov, in recognition of his approvedby the CNMMN on this basis, the composition geological and mineralogical work on the relevant massif. is not sufficiently PO* rich to fall within the field appro- The mineral is in the osumilite group and has a compo- priated for such compositions by Scott's IMA-approved sitional similarity to darapiosite,differing notably in the nomenclaturesystem (Am. Mineral.,72, 178-187, 1987). lower Li content and predominanceof Zn over Mn. Dus- Benauite thus is an intermediate member, analogous to matovite may be the unnamed mineral of Nadezhina et corkite and beudantite,and is compositionally the Sr an- al. (Am. Mineral., 77, 45I-452, 1992). Type material is alog of corkite, i.e., ideally SrFe.(PO.,SO"),(OH,H,O)6.in the Museum of the Ilmen State Preserve,Miass, Rus- J.L.J. sia. N.N.P. Dusmatovite* Ferriphlogopite L.A. Pautov, A.A. Agakhanov,E.V. Sokolova,K.I. Ig- M.F Brigatti, L. Medici, L. Poppi (1996) Reflnement of natenko (1996) Dusmatovite, a new mineral of the mi- the structure of natural ferriphlogopite. Clays Clay Minerals, 44(4), 540-545 * Before publication, minerals marked with an asterisk were approved by the Commission on New Minerals and Mineral Elecffon microprobe and single-crystal X-ray structure Names, International Mineralogical Association. studv of two mica crvstals from an alkali-carbonaticcom- 0003-004x/97l0304-0430$05.00 430 JAMBOR ET AL.: NEW MINERAL NAMES 431 plex near Tapira, Minas Gerais,Brazll, gave compositions Strongest lines of the X-ray powder p3ttern (Nikishova of (KonnNaoo,)r, *(Mgr r. FefrlrFeflf;rTionr)>,ee[(Fe8j5si3 0s):4 m et al., 1992) are 5.88(37,020),470(54,210), 4.21(40,130), O,o,r](OH), ,nFooo and K, or(Mg,u.FefrjoFefij,Mtro o,)r. oo 3.01(25,246), 2.915(100,330), and 2.354(30,420). Nu- [(FefidrSi.n.)roooO,0,, XOH), ,.Fnor.The respectivecrystals merous weaker lines, the most intense of which are at are of the lM polytype, space group C2lm, a : .5.362, 2.946(14,040) and 2.878(6,141), distinguish the pattern 5.3649,b : 9.288,9.2924, c : 10.321,10.3255 A, g : from that of canasite. Data published for mineral IMA 99.99,99.988, R : 0.031,0.025. Fe3* substitutes for Si No. 94-050 indicate that frankameniteis biaxial negative, within the tetrahedralsites, and the Fe distribution is fully a : 1.536,B : 1.539,1 : 1.542,2V-"" : 70, 2V."'.: ordered. 89.8'.N.N.P. Discussion. The composition correspondsto the Fe3t analog of biotite or the Mg,* analog of ferri-annite. The Gottardiite* name teffaferriphlogopite has also been used to indicate E. Galli, S. G.Yezzalinl A. Albeti (1996) Gor the presenceof Fe3" in micas in this compositionalrange, Quartieri, tardiite, a new high-silica zeolite from Antarctica: The but neither feniphlogopite nor tetraferriphlogopite is an ap- natural counterpafi of synthetic NU-87. Eur. J. Min- proved name. See also the discussion, concerning tet- eral.. 8. 687-693. raferriphlogopite,i\ Am. Mineral., 81, 1517-1518,1996. J.L.J. Electron microprobe analysis gave SiO, 69.23, AlrO. 9.40, Fe,O. 0.10, MgO 1.24, CaO 2.61, SrO 0.04, BaO 0.03, Na,O 0.'17, K,O 0.08, H,O (TGA) 16.44, sum Frankarnenite* lffi .00 wt%o,corresponding to (Na, *Ko,r)rr rol\4g.,.(Cao* L.V. Nikishova, K.A. Lazebnik, I.V. Rozhdestvenskaya, Srn*Bao or)ro no(Si,, r, rAl,8 r.Feo,.)r,.u o.Orrr.92. 80HrO, sim- N.N. Emelyanova,Yu.D. Lazebnik (1996) Frankamen- plified as Na.Mg.CarSi tnA'ltso21193HrO.The DTG curve ite K.Na.Ca.(Si,rO.o)F.(OH).HrO-A new mineral, the shows a broad band with two peaks at 121 and 115 "C, triclinic analog of canasite from charoitites. Zapiski suggestingalmost continuous loss of HrO, and complete Vseross. Mineral. Obshch., 125(2), 106-108 (in rehydration occurs spontaneouslyin samplesafter heating Russian). to at least 800 'C. The mineral occurs as thin lamellae, Twelve electron microprobe analyses,with F and HrO elongate [100] or pseudohexagonal,typically in subpar- by wet chemistry, gave a mean and range of NarO 6.93 allel (001) or wedge-shapedaggregates. Transparent, col- (6.15-7.60), K,O 10.53(9.83- 1l. I I ), CaO 21.62(20.90- orless to light straw, brittle, FI not determinable, con- 22.23), SrO 0.23 (0.05-0.40), MgO 0.07 (0.02-0.12), choidal to irregular fracture, perfect {001} cleavage, : MnO 0.38 (0.20-0.54),FeO 0.13 (0.04-0.22),SiO,55.06 nonfluorescent,D-""" 2.14(4),D*r: 2.16 glcm'for Z (54.11-55.71),H,O 2.00(1.98-2.10), F 4.10(3.12-4.20), : l. Maximum crystal size is 0.3 x 0.2 x 0.02 mm; sum 101.05wtEo, corresponding to Krn.Narn.(Ca.o.Mnoor)observedforms are {001J and minor {0T0}. {140}, and : : (Si,rO.n)Fr8.(OH),.r.0.79HrO. Occursas lathstypically I {110}. Optically biaxial negative,ct 1.480(2), B = <60, : : cm and rarely to 15 cm in length, elongate[001], showing r.48s(2),t r.486(2),2v-.,": ZV*n 48', X : : prismatic and Grayishlilac, bluish b, Y a, Z c. Single-crystal X-ray study indicated {100}, {010}, {110}. - gray, or light green color, white streak, viffeous luster, orthorhombic symmetry, space grortp C^mca, a : : perfect {010} and {100} cleavages,microtwinned on 13.698(2),b 25.213(3),c 22.660(2)A.
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