000179697 001__ 179697
000179697 005__ 20181203022807.0
000179697 0247_ $$2doi$$a10.2113/gscanmin.45.5.1229
000179697 022__ $$a0008-4476
000179697 02470 $$2ISI$$a000251443200010
000179697 037__ $$aARTICLE
000179697 245__ $$aPizgrischite, (Cu,Fe)Cu14PbBi17S35, a new sulfosalt from the Swiss Alps: Description, crystal structure and occurrence
000179697 260__ $$bMineralogical Association of Canada$$c2007
000179697 269__ $$a2007
000179697 336__ $$aJournal Articles
000179697 520__ $$aPizgrischite, (Cu,Fe)Cu14PbBi17S35, is a new mineral species named after the type locality, Piz Grisch Mountain, Val Ferrera, Graubunden, Switzerland. This sulfosalt occurs as thin, striated, metallic lead-grey blades measuring up to I cm in length, embedded in quartz and associated with tetrahedrite, chalcopyrite, pyrite, sphalerite, emplectite and derivatives of the aikinite-bismuthinite series. In plane-polarized light, the new species is brownish grey with no perceptible pleochroism; under crossed nicols in oil immersion, it presents a weak anisotropy with dark brown tints. Minimum and maximum reflectance values (in %) in air are: 40.7-42.15 (470 nm), 41.2-43.1 (546 nm), 41.2-43.35 (589 nm) and 40.7-43.3 (650 nm). Cleavage is perfect along 001 I and well developed on {010}. Abundant polysynthetic twinning is observed on (010). The mean micro-indentation hardness is 190 kg/mm(2) (Mohs hardness 3.3), and the calculated density is 6.58 g/cm(3). Electron-microprobe analyses yield (wt%; mean result of seven analyses): Cu 16.48, Pb 2.10, Fe 0.77, Bi 60.70, Sb 0.35, S 19.16, Se 0.04, total 99.60. The resulting empirical chemical formula is (Cu15.24Fe0.80Pb0.60)(Sigma 16.64)(Bi17.07Sb0.17)(Sigma 17.24)(S35.09Se0.03)(Sigma 35.12), in accordance with the formula derived from the single-crystal refinement of the structure, (Cu,Fe)Cu14PbBi17S35. Pizgrischite is monoclinic, space group C2/m, with the following unit-cell parameters: a 35.054(2), b3.91123(I), c43.192(2) angstrom, beta 96.713(4)degrees, V5881.24 angstrom(3), Z=4. The strongest seven X-ray powder-diffraction lines [d in angstrom (I)(hkl)] are: 5.364(40)((6) over bar 04), 4.080(50)((8) over bar 05), 3.120(40)(118), 3.104(68)((3) over bar 18), 2.759(53) ((9) over bar 11),2.752(44)(910) and 1.956(100)(020). The crystal structure is an expanded monoclinic derivative of kupcikite. Pizgrischite belongs to the cuprobismutite series of bismuth sulfosalts but, sensu stricto, it is not a homologue of cuprobismutite. At the type locality. pizarischite is the result of the Alpine metamorphism under greenschist-facies conditions of pre-Tertiary hydrothermal Cu-Bi mineralization.
000179697 6531_ $$apizgischite
000179697 6531_ $$anew mineral species
000179697 6531_ $$asulfosalt
000179697 6531_ $$acrystal structure
000179697 6531_ $$akupcikite
000179697 6531_ $$aAlps
000179697 6531_ $$aSwitzerland
000179697 6531_ $$aBi-S System
000179697 6531_ $$aVal-Ferrera
000179697 6531_ $$aHomologous Series
000179697 6531_ $$aMn Deposit
000179697 6531_ $$aMinerals
000179697 6531_ $$aCuprobismutite
000179697 6531_ $$aCoordination
000179697 6531_ $$aHodrushite
000179697 6531_ $$aChemistry
000179697 6531_ $$aKupcikite
000179697 700__ $$aMeisser, Nicolas
000179697 700__ $$0241567$$aSchenk, Kurt$$g153052
000179697 700__ $$aBerlepsch, Peter
000179697 700__ $$aBrugger, Joel
000179697 700__ $$aBonin, Michel
000179697 700__ $$aCriddle, Alan J.
000179697 700__ $$aThelin, Philippe
000179697 700__ $$aBussy, Francois
000179697 773__ $$j45$$q1229-1245$$tCanadian Mineralogist
000179697 909C0 $$0252038$$pLCR
000179697 909CO $$ooai:infoscience.tind.io:179697$$pSB$$particle
000179697 917Z8 $$x168557
000179697 937__ $$aEPFL-ARTICLE-179697
000179697 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000179697 980__ $$aARTICLE