Encyclopedia > Hibonite

Article Content

Hibonite

Hibonite ( (Ca,Ce)(Al,Ti,Mg)₁₂O₁₉ ) is a brownish black mineral with a hardness of 7,5-8,0 and a hexagonal cristall system. It is rare. Some presolar grains in primitive meteorites consists of Hibonit.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

List of closed London Underground stations

... Aldwych branch of the Piccadilly Line) These stations once served by the Metropolitan Line, District Line or Northern City Line (Great Northern & City Railway) remain ...