Mohite (original) (raw)

A valid IMA mineral species

Specific Gravity:

4.86 (Calculated)

Crystal System:

Monoclinic

Name:

Named in 1982 by V. A. Kovalenka, V. S. Malov, T. L. Evstigneeva, and L. S. Vyals in honor of Günter Harald Moh (May 2, 1929 - May 13, 1993), professor at the University of Heidelberg, Germany. A specialist in ore and experimental mineralogy, he performed numerous studies on sulphide systems and first synthesised the compound.

The S analogue of okruginite.

Synthetic Cu2SnS3 apparently has two low-temperature polymorphs: a monoclinic one (Onoda et al., 2000; probably identical to mohite) and a (disordered) stannite-type structure (Chen et al., 1998). A phase transition occurs 780°C, leading to a sphalerite-type structure.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2741:6

IMA Classification of MohiteHide

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Type description reference:

Classification of MohiteHide

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2.CB.15b

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.

2.9.16.1

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1

6.1.2

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
1 : Sulphostannates and other sulfides containing Sn

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.

Physical Properties of MohiteHide

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Hardness:

VHN10=151 - 203 kg/mm2 - Vickers

Density:

4.86 g/cm3 (Calculated)

Optical Data of MohiteHide

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Anisotropism:

Distinct, but no color effects

Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 25.9%.

Colour in reflected light:

Gray with a greenish tint

Chemistry of MohiteHide

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Crystallography of MohiteHide

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Crystal System:

Monoclinic

Cell Parameters:

a = 6.64 Å, b = 11.51 Å, c = 19.93 Å
β = 109.75°

Ratio:

a:b:c = 0.577 : 1 : 1.732

Unit Cell V:

1,433.58 ų (Calculated from Unit Cell)

Morphology:

Grains to 80 microns

Comment:

Space group not determined; c parameter and beta probably incorrect - synthetic, twinned material has space group Cc, a = 6.653(1), b = 11.537(2), c = 6.665(1) Å, β = 109.39(3)° (Onoda et al., 2000).

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

Hydrothermal

Type Occurrence of MohiteHide

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General Appearance of Type Material:

Small grains, usually elongated (up to 10 x 50-80 µm) in goldfieldite-famatinite-tetrahedrite ores.

Associated Minerals at Type Locality:

Synonyms of MohiteHide

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Other Language Names for MohiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

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

Internet Links for MohiteHide

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References for MohiteHide

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Reference List:

**Chen, Xue-an, Wada, Hiroaki, Sato, Akira, Mieno, Masahiro (1998) Synthesis, electrical conductivity, and crystal structure of Cu4Sn7S16 and structure refinement of Cu2SnS3. Journal of Solid State Chemistry, 139. 144-151 doi:10.1006/jssc.1998.7822**[This Cu2SnS3 dimorph has a (disordered) stannite-type structure.]

Localities for MohiteHide

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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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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.