Tongbaite
Encyclopedia
Tongbaite is a rare mineral that has the chemical formula Cr3C2, or chromium carbide
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It was first described in 1983 for an occurrence in Liu village, Tongbai, Henan Province, China
and named for the locality. It occurs in an ultramafic rock deposit. It has also been reported from the Tibet Autonomous Region
and from the Isovsky District in the Urals of Russia.
Chromium carbide
Chromium carbide is an extremely hard refractory ceramic material. It is usually processed by sintering. It has the appearance of a gray powder with orthorhombic crystal structure. The orthorhombic Cr3C2 occurs extremely rarely as mineral tongbaite....
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It was first described in 1983 for an occurrence in Liu village, Tongbai, Henan Province, China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
and named for the locality. It occurs in an ultramafic rock deposit. It has also been reported from the Tibet Autonomous Region
Tibet Autonomous Region
The Tibet Autonomous Region , Tibet or Xizang for short, also called the Xizang Autonomous Region is a province-level autonomous region of the People's Republic of China , created in 1965....
and from the Isovsky District in the Urals of Russia.