A phosphide with the chemical composition (Fe,Ni) 3 P, it is a mineral commonly found in iron meteorites. It has a tetragonal crystal system. It is an opaque mineral with a metallic luster, and is silvery white in color. Its Mohs hardness is 6.5-7, but it is brittle. Its specific gravity is 7.0-7.8. In addition to iron meteorites, it is found in meteorites formed in reducing environments, such as stony-iron meteorites and stony meteorites containing enstatite, certain types of lunar rocks, and on Earth in spontaneous combustion products from coal mountains. Those in iron meteorites may contain small amounts of cobalt. [Takeda Hiroshi] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
(Fe,Ni)3Pの化学組成をもつリン化物で,鉄隕石などに普通にみられる鉱物。正方晶系。金属光沢をもつ不透明鉱物で,銀白色などを示す。モース硬度は6.5~7であるがもろい。比重は7.0~7.8。鉄隕石のほか,石鉄隕石,エンスタタイトを含む石質隕石など,還元環境でできた隕石,ある種の月の石,地球上では石炭山の自然発火燃焼物中に見られる。隕鉄中のものは少量のコバルトを含むことがある。【武田 弘】
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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