Pampaloite, AuSbTe, a new mineral from Pampalo gold mine, Finland

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F19%3A00000019" target="_blank" >RIV/00025798:_____/19:00000019 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/19:00519129

Result on the web

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/pampaloite-ausbte-a-new-mineral-from-pampalo-gold-mine-finland/974D494CE21F91E4A31E303C836F289D" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/pampaloite-ausbte-a-new-mineral-from-pampalo-gold-mine-finland/974D494CE21F91E4A31E303C836F289D</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2018.129" target="_blank" >10.1180/mgm.2018.129</a>

Result language

angličtina

Original language name

Pampaloite, AuSbTe, a new mineral from Pampalo gold mine, Finland

Original language description

Pampaloite, AuSbTe is a new mineral discovered in the Pampalo gold deposit, Finland. It forms anhedral grains (up to about 20 micrometer) intergrown with gold, frohbergite and altaite. Pampaloite is brittle and has a metallic lustre. Values of VHN25 lie between 245 and 295 kg/mm2, with a mean value of 276 kg/mm2, corresponding to a Mohs hardness of approximately 4-5 (measured on synthetic material). In plane-polarized light, pampaloite is white with medium to strong bireflectance, weak reflectance pleochroism from slightly pinkish-brown to slightly bluish white (only visible in grains of synthetic material containing multiple orientations), and strong anisotropy, with blue to light brown rotation tints; it exhibits no internal reflections. Reflectance values of pampaloite in air (R1, R2 in percent) are: 60.0, 62.5 at 470 nm, 62.5, 64.8 at 546 nm, 63.2, 65.6 at 589 nm and 63.7, 66.0 at 650 nm. Ten electron-microprobe analyses of natural pampaloite give an average composition: Au 44.13, Sb 27.44, and Te 28.74, total 100.31 wt.percent, corresponding to the empirical formula Au1.00Sb1.00Te1.00 based on 3 atoms; the average of eleven analyses on synthetic pampaloite is: Au 44.03, Sb 27.26, and Te 29.08, total 100.38 wt.percent, corresponding to Au0.99Sb1.00Te1.01. The density, calculated on the basis of the empirical formula, is 9.33 g/cm3.The mineral is monoclinic, space group C2/c, with a 11.947(3), b 4.481(1) angstroem, c 12.335(3) angstroem, beta 105.83(2)º, V 635.3(3) angstroem3 and Z = 8. The crystal structure was solved and refined from the single-crystal X-ray-diffraction data of synthetic AuSbTe. Pampaloite crystal structure can be considered as a monoclinic derivative of the CdI2-structure composed of [AuTe3Sb3] octahedra. The strongest lines in the X-ray powder diffraction pattern of synthetic pampaloite [d in angstroem (I) (hkl)] are: 4.846(24)(-202), 3.825(18)(111), 2.978(100)(-311), 2.968(50)(004), 2.242(25)(020), 2.144(55)(313), 2.063(33)(-315), 1.789(18)(024). The mineral is named for the locality, the Pampalo gold mine in Finland.

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

10504 - Mineralogy

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

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

83

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

393-400

UT code for WoS article

000478061800007

EID of the result in the Scopus database

2-s2.0-85068656546