Norilskite, (Pd,Ag)7Pb4, a new mineral from Noril`sk -Talnakh deposit, Russia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F17%3A00000027" target="_blank" >RIV/00025798:_____/17:00000027 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1180/minmag.2016.080.125" target="_blank" >http://dx.doi.org/10.1180/minmag.2016.080.125</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/minmag.2016.080.125" target="_blank" >10.1180/minmag.2016.080.125</a>

Result language

angličtina

Original language name

Norilskite, (Pd,Ag)7Pb4, a new mineral from Noril`sk -Talnakh deposit, Russia

Original language description

Norilskite, (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 about 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/mm2, with a mean value of 310 kg/mm2, corresponding to a Mohs hardness of approximately 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. Reflectance values of norilskite in air (Ro, Re’ in %) are: 51.1, 48.8 at 470nm, 56.8, 52.2 at 546nm, 59.9, 53.5 at 589nm and 64.7, 55.5 at 650nm. Sixteen electron-microprobe analyses of natural norilskite gave an average composition: Pd 44.33, Ag 2.68, Bi 0.33, and Pb 52.34, total 99.68 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 100.33 wt.%, 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 crystal structure 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 mineral is named for the locality, the Noril`sk district in Russia.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Volume of the periodical

81

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

531-541

UT code for WoS article

000404511500007

EID of the result in the Scopus database

2-s2.0-85021179015