Tellurobismuthite is a telluride mineral

Telluride mineral

A telluride mineral is a mineral that has the telluride anion as a main component.Tellurides are similar to sulfides and are grouped with them in both the Dana and Strunz mineral classification systems.Examples include:* calaverite* hessite* rickardite...

: bismuth telluride

Bismuth telluride

Bismuth telluride is a gray powder that is a compound of bismuth and tellurium also known as bismuth telluride. It is a semiconductor which, when alloyed with antimony or selenium is an efficient thermoelectric material for refrigeration or portable power generation...

 (Bi

Bismuth

Bismuth is a chemical element with symbol Bi and atomic number 83. Bismuth, a trivalent poor metal, chemically resembles arsenic and antimony. Elemental bismuth may occur naturally uncombined, although its sulfide and oxide form important commercial ores. The free element is 86% as dense as lead...

₂Te₃). It has a trigonal structure and lattice parameters a=0.439 nm and c=3.06 nm. There are natural cleavage planes in the (0001) direction as the crystal is effectively lamellar (layered) in that plane. The Mohs hardness is 2 and the specific gravity

Specific gravity

Specific gravity is the ratio of the density of a substance to the density of a reference substance. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. The reference substance is nearly always water for...

 is 7.815. It is a dull grey colour, which is particularly lustrous on initial fracture.

It is found in Telemark

Telemark

is a county in Norway, bordering Vestfold, Buskerud, Hordaland, Rogaland and Aust-Agder. The county administration is in Skien. Until 1919 the county was known as Bratsberg amt.-Location:...

, Norway and in the USA in Hidalgo County, New Mexico

Hidalgo County, New Mexico

-2010:Whereas according to the 2010 U.S. Census Bureau:*85.3% White*0.6% Black*0.8% Native American*0.5% Asian*0.0% Native Hawaiian or Pacific Islander*1.8% Two or more races*11.0% Other races*56.6% Hispanic or Latino...

 and Lumpkin County, Georgia

Lumpkin County, Georgia

Lumpkin County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 29,966. Its county seat is Dahlonega.- History :...

.