Kravtsovite, Pd2AgS, 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%3A00000091" target="_blank" >RIV/00025798:_____/17:00000091 - isvavai.cz</a>

Result on the web

<a href="https://www.schweizerbart.de/journals/ejm" target="_blank" >https://www.schweizerbart.de/journals/ejm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/ejm/2017/0029-2653" target="_blank" >10.1127/ejm/2017/0029-2653</a>

Result language

angličtina

Original language name

Kravtsovite, Pd2AgS, a new mineral from Noril`sk -Talnakh deposit, Russia

Original language description

Kravtsovite, PdAg2S is a new platinum-group mineral discovered in the Komsomolsky mine of the Talnakh deposit, Noril'sk district, Russia. It forms equant inclusions (from a few μm to 40-50 μm) in silicates and pyrite, commonly intergrown with vysotskite and Au-Ag alloy in aggregates (100-200 μm in size) with telargpalite, cooperite, braggite, vysotskite, sopcheite, stibiopalladinite, sobolevskite, moncheite, kotulskite, malyshevite and insizwaite. Kravtsovite is brittle; it has a metallic lustre and a grey streak. In plane-polarized light, kravtsovite is yellowish white, has strong bireflectance, is strongly pleochroic in shades of slightly yellowish white to bluish grey, and exhibits a strong anisotropy with rotation tints of salmon-pink, orange, pale blue and dark blue-black. It exhibits no internal reflections. Reflectance values in air (R1, R2 in %) are: 32.2, 38.3 at 470, 31.6, 39.4 at 546, 30.2, 39.8 at 589 and 28.8, 41.1 at 650 nm. Eighteen electron-microprobe analyses of kravtsovite gives the average composition: Pd 30.53, Ag 60.11, S 8.47, and Se 0.74, total 99.85 wt.%, corresponding to the empirical formula Pd1.03Ag1.99(S0.95Se0.03)∑0.98 based on a total of 4 apfu. The average of eight analyses on synthetic kravtsovite is: Pd 30.98, Ag 60.27, and S 8.81, total 100.07 wt. %, corresponding to Pd1.04Ag1.99S0.98. The mineral is orthorhombic, space group Cmcm, with a 7.9835(1), b 5.9265(1), c 5.7451(1) Å, V 271.82(1) Å3 and Z = 4. The crystal structure was refined from the powder X-ray-diffraction data of synthetic analogue. The strongest lines in the X-ray powder diffraction pattern of synthetic kravtsovite [d in Å (I) (hkl)] are: 2.632(51)(021), 2.458(65)(112), 2.4263(71)(310), 2.3305(60)(202), 2.2352(100)(311), 2.1973(48)(221), 2.0619(42)(022), 1.9172(30)(130), 1.3888(31)(240,332), 1.3586(28)(512). The mineral honours V.F. Kravtsov, one of the finders of Talnakh and Oktyabrsk deposits in the Noril'sk district of 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

European Journal of Mineralogy

ISSN

0935-1221

e-ISSN

—

Volume of the periodical

29

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

6

Pages from-to

597-602

UT code for WoS article

000414881100027

EID of the result in the Scopus database

2-s2.0-85031314327