…They are called C chondrites because they contain carbonaceous matter. H, L, and LL chondrites are frequently found, so they are collectively called ordinary chondrites (O chondrites). O chondrites contain a large amount of both metallic iron and iron oxide, so they are thought to have formed in a more oxidizing atmosphere than E chondrites and a more reducing atmosphere than C chondrites. … *Some of the terminology that refers to "O chondrite" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…炭素質物質carbonaceous matterを含むのでCコンドライトといわれる。H,LおよびLLコンドライトは産出頻度が高いのでまとめてオーディナリ-コンドライト(Oコンドライト)といわれる。Oコンドライトは金属鉄も酸化鉄も共にかなり含むのでEコンドライトよりは酸化的で,Cコンドライトよりは還元的雰囲気の状態で形成されたものと考えられている。… ※「O コンドライト」について言及している用語解説の一部を掲載しています。 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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