Taenite (English spelling)

Japanese: テーナイト(英語表記)taenite
Taenite (English spelling)
Of the nickel-iron alloys that make up iron meteorites, this corresponds to the metallic phase with a Ni content of 30-60%, and metallurgically corresponds to gamma-phase iron (face-centered cubic lattice). In addition to iron meteorites, it is also found in stony and stony-iron meteorites, but is thought to have crystallized under strongly reduced conditions. Mohs hardness 5, no cleavage. Steel gray to grayish white, opaque, white on a polished surface. Isotropic. No reflection pleochroism or anisotropy, and (111) twins present. It exists as a thin layer in the Widmanstätten structure seen in octahedrite.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
鉄隕石を構成するニッケル‐鉄合金のうち,Ni含有量30~60%の金属相に相当し,冶金学的にはγ相の鉄(面心立方格子)にあたる。鉄隕石のほかに石質隕石,石鉄隕石中にも存在するが,強い還元状態で晶出したものと考えられる。モース硬度5で,へき開なし。鋼灰~灰白色,不透明,研磨面では白色。等方性。反射多色性,異方性ともになく,(111)の双晶存在。オクタヘドライト中に見られるウィドマンシュテッテン構造中では薄層をなして存在する。

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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