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dc.contributor.authorVymazalova, A
dc.contributor.authorLaufek, F
dc.contributor.authorSluzhenikin, SF
dc.contributor.authorStanley, Christopher
dc.identifier.citationVymazalová, A., Laufek, F., Sluzhenikin, S., & Stanley, C. (2017). Norilskite, (Pd,Ag)7Pb4, a new mineral from Noril'sk-Talnakh deposit, Russia. Mineralogical Magazine, 81(3), 531-541. doi:10.1180/minmag.2016.080.125en_US
dc.description.abstractNorilskite, (Pd,Ag)7Pb4 is a new platinum-group mineral discovered in the Mayak mine of the Talnakh deposit, Russia. It forms anhedral grains in aggregates (up to ∼400 μm) with polarite, zvyagintsevite, Pd-rich tetra-auricupride, Pd-Pt bearing auricupride,Ag-Au alloys, (Pb,As,Sb) bearing atokite, mayakite, Bi-Pb-rich kotulskite and sperrylite in pentlandite, cubanite and talnakhite. Norilskite is brittle, has a metallic lustre and a grey streak. Values of VHN20 fall between 296 and 342 kg mm–2, with a mean valueof 310 kg mm–2, corresponding to a Mohs hardness of ∼4. In plane-polarized light, norilskite is orange-brownish pink, has moderate to strong bireflectance, orange-pink to greyish-pink pleochroism, and strong anisotropy; it exhibits no internal reflections. Reflectancevalues of norilskite in air (Ro, Re' in %) are: 51.1, 48.8 at 470 nm, 56.8, 52.2 at 546 nm, 59.9, 53.5 at 589 nm and 64.7, 55.5 at 650 nm. Sixteen electronmicroprobe analyses of natural norilskite gave an average composition: Pd 44.33, Ag 2.68, Bi 0.33 and Pb 52.34, total99.68 wt.%, corresponding to the empirical formula (Pd6.56Ag0.39)∑6.95(Pb3.97Bi0.03)∑4.00 based on 4 Pb + Bi atoms; the average of eight analyses on synthetic norilskite is: Pd 42.95, Ag 3.87 and Pb 53.51, total 100.33wt.%, corresponding to (Pd6.25Ag0.56)∑6.81Pb4.00. The mineral is trigonal, space group P3121, with a = 8.9656(4), c = 17.2801(8) Å, V = 1202.92(9) Å3 and Z = 6. The crystalstructure was solved and refined from the powder X-ray diffraction data of synthetic (Pd,Ag)7Pb4. Norilskite crystallizes in the Ni13Ga3Ge6 structure type, related to nickeline. The strongest lines in the powder X-ray diffraction patternof synthetic norilskite [d in Å (I) (hkl)] are: 3.2201(29)(023,203), 2.3130(91)(026,206), 2.2414(100)(220), 1.6098(28)(046,406), 1.3076(38)(246,462), 1.2942(18)(600), 1.2115(37)(22.12,12.13), 0.9626(44) (06.12,60.12). The mineral is named for the locality, the Noril'sk district in Russia.en_US
dc.publisherCambridge University Pressen_US
dc.titleNorilskite, (Pd,Ag)7Pb4, a new mineral from Noril'sk-Talnakh deposit, Russiaen_US
dc.typeJournal Articleen_US
dc.identifier.journalMineralogical Magazineen_US
dc.identifier.startpage531 - 541en_US
dc.internal.reviewer-noteMineralogical Magazine - published and can approve attached verison 14.8.18en
pubs.organisational-group/Natural History Museum
pubs.organisational-group/Natural History Museum/Science Group
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences/Economic and Environmental Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Functional groups
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Research
dc.embargoNot knownen_US
elements.import.authorVymazalová, Aen_US
elements.import.authorLaufek, Fen_US
elements.import.authorSluzhenikin, SFen_US
elements.import.authorStanley, CJen_US
dc.description.nhm© The Mineralogical Society of Great Britain and Ireland 2017. The attached document is the authors’ preproof accepted version of the journal article, which is made available under a Creative Commons CC-BY-NC-ND license: You are advised to consult the publisher’s version if you wish to cite from it.en_US
dc.subject.nhmplatinum-group mineralen_US
dc.subject.nhm(Pd,Ag)7Pb4 phaseen_US
dc.subject.nhmelectron-microprobe dataen_US
dc.subject.nhmreflectance dataen_US
dc.subject.nhmX-ray-diffraction dataen_US
dc.subject.nhmcrystal structureen_US
dc.subject.nhmMayak mineen_US
dc.subject.nhmTalnakh depositen_US
dc.subject.nhmNoril`sk districten_US

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