Tvalchrelidzeite (original) (raw)

A valid IMA mineral species

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About TvalchrelidzeiteHide

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Colour:

Lead-gray, very dark red, dark cherry red in transmitted light

Crystal System:

Monoclinic

Name:

Named after Alexander Anton Tvalchrelidze (19 November (1 Dec) 1881, Stanitsa Batalpashinskaya, Russian Empire (now Cherkessk, Russia) - 29 July 1957, Tbilisi, Georgia), academician, and founder of the mineralogical-petrographic school, Georgia Academy of Science in 1919. He wrote the first crystallography textbooks in Georgian. He also led numerous expeditions that discovered useful deposits of metals, marble, and in particular, clay deposits.

This page provides mineralogical data about Tvalchrelidzeite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4064:4

73dfe8d4-ce76-41ec-9411-fa920177c36e

IMA Classification of TvalchrelidzeiteHide

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Type description reference:

Gruzdev, V.S., Mchedlishvili, N.M., Terakhova, G.A., Tsertsvadze, Z.Y., Chernitsova, N.M., Shumkova, N.G. (1975) Tvalchrelidzeite, Hg12(Sb,As)8S15, a new mineral from the Gomi arsenic—antimony—mercury deposit, Caucasus. Doklady Akademii Nauk SSSR: 225: 911-913.

Classification of TvalchrelidzeiteHide

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2.GC.45

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites

3.8.3.1

3 : SULFOSALTS
8 : 1 < ø < 2

5.4.8

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol Source Reference
Tva IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of TvalchrelidzeiteHide

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Colour:

Lead-gray, very dark red, dark cherry red in transmitted light

Streak:

Nearly black witha dark reddish tint

Cleavage:

Perfect
Perfect in one direction

Fracture:

Irregular/Uneven, Conchoidal

Density:

7.380(5) g/cm3 (Measured)

Optical Data of TvalchrelidzeiteHide

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Anisotropism:

Dark olive to dark violet

Reflectivity:

Wavelength R1 R2
400nm 39.9% 45.0%
420nm 40.0% 44.5%
440nm 40.1% 43.4%
460nm 40.3% 42.6%
480nm 40.7% 40.9%
500nm 40.8% 39.9%
520nm 40.6% 38.7%
540nm 39.2% 37.1%
560nm 37.7% 35.8%
580nm 36.5% 34.8%
600nm 35.5% 34.0%
620nm 34.7% 33.4%
640nm 33.8% 32.8%
660nm 33.2% 32.4%
680nm 32.6% 32.0%
700nm 32.0% 31.6%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 45.0%.
R1 shown in black, R2 shown in red

Colour in reflected light:

Whitish

Internal Reflections:

Strong, dark red

Chemistry of TvalchrelidzeiteHide

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Crystallography of TvalchrelidzeiteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 11.5526 Å, b = 4.3852 Å, c = 156373 Å
β = 91.845(2)°

Ratio:

a:b:c = 2.634 : 1 : 35659.263

Comment:

Space group P21/n.

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0006159 Tvalchrelidzeite Yang H, Downs R T, Costin G, Eichler C M (2007) The crystal structure of tvalchrelidzeite, Hg3SbAsS3, and a revision of its chemical formula The Canadian Mineralogist 45 1529-1533 2007 Gomi deposit, Rioni River Valley, Caucacus Mountains, Georgia 0 293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
3.49 Å (100)
2.92 Å (100)
2.89 Å (100)
2.080 Å (100)
3.29 Å (70)
2.031 Å (35)
3.19 Å (30)

Geological EnvironmentHide

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Type Occurrence of TvalchrelidzeiteHide

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General Appearance of Type Material:

Place of Conservation of Type Material:

A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 77110.
National Museum of Natural History, Washington, D.C., USA, 143827.

Reference:

Gruzdev, V.S., Mchedlishvili, N.M., Terakhova, G.A., Tsertsvadze, Z.Y., Chernitsova, N.M., Shumkova, N.G. (1975) Tvalchrelidzeite, Hg12(Sb,As)8S15, a new mineral from the Gomi arsenic—antimony—mercury deposit, Caucasus. Doklady Akademii Nauk SSSR: 225: 911-913.

Download:

<Gruzdev, V.S., Mchedlishvili, N.M., Terakhova, G.A., Tsertsvadze, Z.Y., Chernitsova, N.M., Shumkova, N.G. %281975%29 Tvalchrelidzeite, Hg12%28Sb,As%298S15, a new mineral from the Gomi arsenic—antimony—mercury deposit, Caucasus. Doklady Akademii Nauk SSSR: 225: 911-913.>

Synonyms of TvalchrelidzeiteHide

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Other Language Names for TvalchrelidzeiteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Electrical:

Poor conductor of electricity

Notes:

Etch tests with standard reagents gave no positive results.

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

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References for TvalchrelidzeiteHide

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Reference List:

Gruzdev, V.S., Mchedlishvili, N.M., Terakhova, G.A., Tsertsvadze, Z.Y., Chernitsova, N.M., Shumkova, N.G. (1975) Tvalchrelidzeite, Hg12(Sb,As)8S15, a new mineral from the Gomi arsenic—antimony—mercury deposit, Caucasus. Doklady Akademii Nauk SSSR: 225: 911-913.

Yang, H., Downs, R. T., Costin, G., Eichler, C. M. (2007) The crystal structure of tvalchrelidzeite, Hg3SbAsS3, and a revision of its chemical formula. The Canadian Mineralogist, 45 (6) 1529-1533 doi:10.3749/canmin.45.6.1529

Localities for TvalchrelidzeiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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