ataxite

Japanese: ataxite
ataxite

...Due to the close correspondence between the average composition of iron meteorites and the average composition of the metallic phase of chondrites, it is assumed that iron meteorites represent metallic phases separated by partial or complete melting of chondritic materials, which correspond to the Earth's central core. Iron meteorites are subdivided according to their Ni content into hexahedrite (Ni 4-6%), octahedrite (Ni 6-14%), and ataxite (Ni 14% or more). Octahedrite, which accounts for about 85% of iron meteorites, contains kamacite (α-iron, Ni 4-6%) and taenite (γ-iron, Ni 30-60%). ...

*Some of the terminology explanations that mention "ataxite" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…鉄隕石の平均組成とコンドライトの金属相の平均組成の密接な対応関係より,鉄隕石はコンドライト組成物質の部分的あるいは完全融解により分離した金属相を代表し,それが地球中心部の核に対応すると推定されている。鉄隕石はNi含有量により,ヘキサヘドライトhexahedrite(Ni4~6%),オクタヘドライトoctahedrite(Ni6~14%)およびアタキサイトataxite(Ni14%以上)に細区分される。鉄隕石のうち約85%を占めるオクタヘドライト中には,カマサイトkamacite(α‐鉄,Ni4~6%)およびテーナイトtaenite(γ‐鉄,Ni30~60%)が含まれる。…

※「ataxite」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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