Actinolite (actinolite)

Japanese: アクチノセン石(アクチノ閃石) - アクチノせんせき（英語表記）actinolite

It is also called actinoambrosite, epidote or diabase. It is _a calcium ambroxite mineral with the chemical composition _Ca2 (Mg,Fe2 ⁺ ) _55Si8O22 (OH) ₂ _. When the Mg/(Mg+Fe2 ⁺ ) ratio is 0.5-0.89, it is called actinocite, when it is 0-0.49 it is called ferroactinolite, and when it is 0.9-1.0 it is called diabase. Mg and Fe are mixed randomly. It may contain small amounts of Al replacing Mg,Fe2 ⁺ or Si.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

アクチノ角セン石，緑セン石あるいは陽起石ともいう。カルシウム角セン石の一つで，化学組成はCa₂(Mg,Fe^2＋)₅₅Si₈O₂₂(OH)₂で表される鉱物。ふつうMg/(Mg＋Fe^2＋)の比が0.5～0.89のものをアクチノセン石，0～0.49のものを鉄アクチノセン石ferroactinolite,0.9～1.0のものを透セン石と呼ぶ。MgとFeは任意に混ざり合う。Mg,Fe^2＋やSiを置き換えてAlを少量含むことがある。

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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