| Frohbergite | |
|---|---|
 Frohbergite (Arizona) | |
| General | |
| Category | Telluride (sulfosalt) mineral |
| Formula (repeating unit) | FeTe2[1] |
| IMA symbol | Frb |
| Strunz classification | 2.EB.10a[1] |
| Crystal system | Orthorhombic |
| Crystal class | sulphide |
| Identification | |
| Color | white with a lilac or pinkish tint[2] |
| Crystal habit | in the form of a thin border or small inclusions |
| Cleavage | the mineral is fragile |
| Mohs scale hardness | 3-4,[2] up to 4.5[3] |
| Luster | metallic |
| Diaphaneity | opaque[2] |
| Density | 8.057 (calculated)[1] 8.055 (measured)[4] |
| Pleochroism | extremely weak.[2] |
Frohbergite (German: Frohbergit, title by proper name: Max Hans Frohberg), also iron telluride is a rare hydrothermal mineral from the sulfide class, in composition — iron telluride with the ideal formula FeTe2 (contains 82.05% tellurium and 17.95% iron).
Frohbergite occurs in tellurium-rich veins of hydrothermal deposits, sometimes as a thin rim on the periphery of chalcopyrite or as inclusions in native gold, petzite or chalcopyrite. It belongs to the marcasite group and forms a mineral line with mattagamite. Frohbergite most often occurs as fine-grained aggregates.[5]: 93
- ^ a b c Frohbergite (A valid IMA mineral species, grandfathered): information about the mineral frohbergite in the Mindat database.
- ^ a b c d John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Hrsg.): Handbook of Mineralogy, Mineralogical Society of America. 2001. — Frohbergite: page in Handbook of mineralogy
- ^ Frohbergite on the website Mineralienatlas (in German)
- ^ Frohbergite (Фробергит): Geowikipedia page. (in Russian)
- ^ Bezsmertnaya M. S., Logikova L. A., Soboleva L. N. Determination of tellurides under a microscope. — Moscow: Nauka, 1969. — 175 p. (in Russian)