…On the other hand, in hexahedrite, a group of thin parallel lines called Neumann bands can be seen. Ataxite consists of extremely fine aggregates of kamasite and taenite (plessite) and shows no regular structure, and is called a massive iron meteorite along with hexahedrite, which has a very low Ni content. The Widmanstätten structure is a typical exsolution structure found in alloys cooled slowly from high temperatures. When taenite of a nickel-iron alloy is cooled slowly from high temperatures in octahedrite, kamasite precipitates parallel to its face-centered lattice (111). … *Some of the terminology explanations that mention "plessite" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…一方,ヘキサヘドライトでは同様にノイマンバンドと呼ばれる細い平行線群が認められる。アタキサイトではきわめて細かなカマサイトとテーナイトの集合体(プレッサイトplessite)からなり,なんら規則的な構造は示さず,Ni含有量のきわめて少ないヘキサヘドライトとともに塊状鉄隕石と呼ばれる。ウィドマンシュテッテン構造は高温からゆっくり冷却された合金に認められる典型的な離溶組織で,オクタヘドライト中でニッケル・鉄合金のテーナイトが高温から徐冷されるとき,その面心格子(111)に平行にカマサイトが析出するために現れる。… ※「plessite」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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