Gladkovskyite, MnTlAs3S6, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia

Anatoly, V Kasatkin; Emil Makovicky; Jakub Plasil; Radek Skoda; Nikita, V Chukanov; Sergey Y. Stepanov; Atali A. Agakhanov; Fabrizio Nestola

doi:10.3190/jgeosci.290

Gladkovskyite, MnTlAs₃S₆, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia

Anatoly, V Kasatkin, Emil Makovicky, Jakub Plasil, Radek Skoda, Nikita, V Chukanov, Sergey Y. Stepanov, Atali A. Agakhanov, Fabrizio Nestola

Geology

2 Citations (Scopus)

Abstract

Gladkovskyite (IMA2018-098), MnTlAs₃ S₆, is a new sulfosalt from the Vorontsovskoe gold deposit, Sverdlovsk Oblast’, Northern Urals, Russia. The new mineral occurs in limestone breccias cemented by abundant realgar, orpiment, baryte and pyrite, as well as minor clinochlore, fluorapatite, quartz and talc. Gladkovskyite forms long-prismatic crystals and grains up to 0.2 mm; it has dark cherry-red color and red streak. It is transparent with adamantine luster. The Vickers microhardness is 94 kg/mm². The new mineral is brittle, with uneven fracture; neither cleavage nor parting was observed. The density calculated based on the empirical formula is 4.356 g/cm³. In reflected light, gladkovskyite is grayish-white, strongly anisotropic with rotation tints varying from light-grey to brown. Its pleochroism is moderate, from orange-red to dark-red, and bireflectance is very weak, ∆R = 0.58 % (589 nm). The empirical formula of gladkovskyite is Mn_1.01 Tl_0.99 Pb_0.01 As_2.86 Sb_0.13 S_6.00 (based on 11 atoms pfu). Prominent features in the Raman spectrum include bands of Mn–S and As–S stretching vibrations as well as numerous low-frequency bands related to phonons. Gladkovskyite is trigonal, R31c, a = 9.6392(2), c = 6.4560(15) Å, V = 519.49(12) Å³ and Z = 2. The seven strongest powder X-ray diffraction lines are [d_obs, Å (I, %) (hkl) ]: 5.11 (80) (101), 4.83 (70) (110), 3.49 (50) (201), 3.23 (30) (002), 2.86 (100) (–2–11, 211), 2.68 (30) (112), 2.55 (60) (301, 202). The crystal structure of gladkovskyite was refined from the single-crystal X-ray diffraction data to R = 0.0178 for 679 observed reflections with I_obs > 3σ(I). It contains infinite chains of face-sharing MnS₆ octahedra, TlS₉ polyhedra and pyramidal AsS₃ groups; the structure belongs to the group of seldom occurring cyclic sulfosalts. The new mineral honors Russian geologist Boris Aleksandrovich Gladkovsky who discovered the Vorontsovskoe gold deposit.

Original language	English
Journal	Journal of Geosciences
Volume	64
Issue number	3
Pages (from-to)	207-218
Number of pages	12
ISSN	1802-6222
DOIs	https://doi.org/10.3190/jgeosci.290
Publication status	Published - 2019

Keywords

gladkovskyite
new mineral
sulfosalt
crystal structure
Vorontsovskoe gold deposit
Northern Urals

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@article{f1c7110c0eb94cf88195104c0d3ae4ff,

title = "Gladkovskyite, MnTlAs3S6, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia",

abstract = "Gladkovskyite (IMA2018-098), MnTlAs3 S6, is a new sulfosalt from the Vorontsovskoe gold deposit, Sverdlovsk Oblast{\textquoteright}, Northern Urals, Russia. The new mineral occurs in limestone breccias cemented by abundant realgar, orpiment, baryte and pyrite, as well as minor clinochlore, fluorapatite, quartz and talc. Gladkovskyite forms long-prismatic crystals and grains up to 0.2 mm; it has dark cherry-red color and red streak. It is transparent with adamantine luster. The Vickers microhardness is 94 kg/mm2. The new mineral is brittle, with uneven fracture; neither cleavage nor parting was observed. The density calculated based on the empirical formula is 4.356 g/cm3. In reflected light, gladkovskyite is grayish-white, strongly anisotropic with rotation tints varying from light-grey to brown. Its pleochroism is moderate, from orange-red to dark-red, and bireflectance is very weak, ∆R = 0.58 % (589 nm). The empirical formula of gladkovskyite is Mn1.01 Tl0.99 Pb0.01 As2.86 Sb0.13 S6.00 (based on 11 atoms pfu). Prominent features in the Raman spectrum include bands of Mn–S and As–S stretching vibrations as well as numerous low-frequency bands related to phonons. Gladkovskyite is trigonal, R31c, a = 9.6392(2), c = 6.4560(15) {\AA}, V = 519.49(12) {\AA}3 and Z = 2. The seven strongest powder X-ray diffraction lines are [dobs, {\AA} (I, %) (hkl) ]: 5.11 (80) (101), 4.83 (70) (110), 3.49 (50) (201), 3.23 (30) (002), 2.86 (100) (–2–11, 211), 2.68 (30) (112), 2.55 (60) (301, 202). The crystal structure of gladkovskyite was refined from the single-crystal X-ray diffraction data to R = 0.0178 for 679 observed reflections with Iobs > 3σ(I). It contains infinite chains of face-sharing MnS6 octahedra, TlS9 polyhedra and pyramidal AsS3 groups; the structure belongs to the group of seldom occurring cyclic sulfosalts. The new mineral honors Russian geologist Boris Aleksandrovich Gladkovsky who discovered the Vorontsovskoe gold deposit.",

keywords = "gladkovskyite, new mineral, sulfosalt, crystal structure, Vorontsovskoe gold deposit, Northern Urals",

author = "Kasatkin, {Anatoly, V} and Emil Makovicky and Jakub Plasil and Radek Skoda and Chukanov, {Nikita, V} and Stepanov, {Sergey Y.} and Agakhanov, {Atali A.} and Fabrizio Nestola",

year = "2019",

doi = "10.3190/jgeosci.290",

language = "English",

volume = "64",

pages = "207--218",

journal = "Journal of Geosciences",

issn = "1802-6222",

publisher = "Czech Geological Survey",

number = "3",

}

TY - JOUR

T1 - Gladkovskyite, MnTlAs3S6, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia

AU - Kasatkin, Anatoly, V

AU - Makovicky, Emil

AU - Plasil, Jakub

AU - Skoda, Radek

AU - Chukanov, Nikita, V

AU - Stepanov, Sergey Y.

AU - Agakhanov, Atali A.

AU - Nestola, Fabrizio

PY - 2019

Y1 - 2019

N2 - Gladkovskyite (IMA2018-098), MnTlAs3 S6, is a new sulfosalt from the Vorontsovskoe gold deposit, Sverdlovsk Oblast’, Northern Urals, Russia. The new mineral occurs in limestone breccias cemented by abundant realgar, orpiment, baryte and pyrite, as well as minor clinochlore, fluorapatite, quartz and talc. Gladkovskyite forms long-prismatic crystals and grains up to 0.2 mm; it has dark cherry-red color and red streak. It is transparent with adamantine luster. The Vickers microhardness is 94 kg/mm2. The new mineral is brittle, with uneven fracture; neither cleavage nor parting was observed. The density calculated based on the empirical formula is 4.356 g/cm3. In reflected light, gladkovskyite is grayish-white, strongly anisotropic with rotation tints varying from light-grey to brown. Its pleochroism is moderate, from orange-red to dark-red, and bireflectance is very weak, ∆R = 0.58 % (589 nm). The empirical formula of gladkovskyite is Mn1.01 Tl0.99 Pb0.01 As2.86 Sb0.13 S6.00 (based on 11 atoms pfu). Prominent features in the Raman spectrum include bands of Mn–S and As–S stretching vibrations as well as numerous low-frequency bands related to phonons. Gladkovskyite is trigonal, R31c, a = 9.6392(2), c = 6.4560(15) Å, V = 519.49(12) Å3 and Z = 2. The seven strongest powder X-ray diffraction lines are [dobs, Å (I, %) (hkl) ]: 5.11 (80) (101), 4.83 (70) (110), 3.49 (50) (201), 3.23 (30) (002), 2.86 (100) (–2–11, 211), 2.68 (30) (112), 2.55 (60) (301, 202). The crystal structure of gladkovskyite was refined from the single-crystal X-ray diffraction data to R = 0.0178 for 679 observed reflections with Iobs > 3σ(I). It contains infinite chains of face-sharing MnS6 octahedra, TlS9 polyhedra and pyramidal AsS3 groups; the structure belongs to the group of seldom occurring cyclic sulfosalts. The new mineral honors Russian geologist Boris Aleksandrovich Gladkovsky who discovered the Vorontsovskoe gold deposit.

AB - Gladkovskyite (IMA2018-098), MnTlAs3 S6, is a new sulfosalt from the Vorontsovskoe gold deposit, Sverdlovsk Oblast’, Northern Urals, Russia. The new mineral occurs in limestone breccias cemented by abundant realgar, orpiment, baryte and pyrite, as well as minor clinochlore, fluorapatite, quartz and talc. Gladkovskyite forms long-prismatic crystals and grains up to 0.2 mm; it has dark cherry-red color and red streak. It is transparent with adamantine luster. The Vickers microhardness is 94 kg/mm2. The new mineral is brittle, with uneven fracture; neither cleavage nor parting was observed. The density calculated based on the empirical formula is 4.356 g/cm3. In reflected light, gladkovskyite is grayish-white, strongly anisotropic with rotation tints varying from light-grey to brown. Its pleochroism is moderate, from orange-red to dark-red, and bireflectance is very weak, ∆R = 0.58 % (589 nm). The empirical formula of gladkovskyite is Mn1.01 Tl0.99 Pb0.01 As2.86 Sb0.13 S6.00 (based on 11 atoms pfu). Prominent features in the Raman spectrum include bands of Mn–S and As–S stretching vibrations as well as numerous low-frequency bands related to phonons. Gladkovskyite is trigonal, R31c, a = 9.6392(2), c = 6.4560(15) Å, V = 519.49(12) Å3 and Z = 2. The seven strongest powder X-ray diffraction lines are [dobs, Å (I, %) (hkl) ]: 5.11 (80) (101), 4.83 (70) (110), 3.49 (50) (201), 3.23 (30) (002), 2.86 (100) (–2–11, 211), 2.68 (30) (112), 2.55 (60) (301, 202). The crystal structure of gladkovskyite was refined from the single-crystal X-ray diffraction data to R = 0.0178 for 679 observed reflections with Iobs > 3σ(I). It contains infinite chains of face-sharing MnS6 octahedra, TlS9 polyhedra and pyramidal AsS3 groups; the structure belongs to the group of seldom occurring cyclic sulfosalts. The new mineral honors Russian geologist Boris Aleksandrovich Gladkovsky who discovered the Vorontsovskoe gold deposit.

KW - gladkovskyite

KW - new mineral

KW - sulfosalt

KW - crystal structure

KW - Vorontsovskoe gold deposit

KW - Northern Urals

U2 - 10.3190/jgeosci.290

DO - 10.3190/jgeosci.290

M3 - Journal article

SN - 1802-6222

VL - 64

SP - 207

EP - 218

JO - Journal of Geosciences

JF - Journal of Geosciences

IS - 3

ER -