Almandine

Japanese: almandine

...It is one of the important rock-forming minerals, belongs to the cubic crystal system, and is a general term for a group of minerals belonging to the garnet group with the chemical composition R ^II ₃ R ^III ₂ Si ₃ O ₁₂ (where R ^II is Ca, Mg, Fe ²⁺ , Mn, and R ^III is Al, Fe ³⁺ , Cr, etc.). The end members are pyrope (Mg ₃ Al ₂ Si ₃ O _{12 )} , almandine (Fe ₃ Al ₂ Si ₃ O _{12 )} , spessartine (Mn ₃ Al ₂ Si ₃ O _{12 )} , grossular (Ca ₃ Al ₂ Si ₃ O _{12 )} , andradite (Ca ₃ Fe ₂ Si ₃ O _{12 )} , uvarovite (Ca ₃ Cr ₂ Si ₃ O _{12 )} , knorringite (Mg ₃ Cr ₂ Si ₃ O _{12 )} and hydrogrossular (Ca ₃ Al ₂ Si ₂ O ₈ (SiO ₄ ) _{1～ m} (OH) _{4 m )} in which some of the Si has been replaced by 4(OH). Andradite with a high Ti content is called melanite. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…重要な造岩鉱物の一つであり，立方晶系に属し，化学組成はR^II₃R^III₂Si₃O₁₂(ここでR^IIはCa,Mg,Fe^2＋，Mn,R^IIIはAl,Fe^3＋，Crなど)で表されるザクロ石族に属する一群の鉱物の総称である。端成分はパイロープMg₃Al₂Si₃O₁₂，アルマンディンalmandine Fe₃Al₂Si₃O₁₂，スペサルティンspessartine Mn₃Al₂Si₃O₁₂，グロッシュラーgrossular Ca₃Al₂Si₃O₁₂，アンドラダイトandradite Ca₃Fe₂Si₃O₁₂，ウバロバイトuvarovite Ca₃Cr₂Si₃O₁₂，ノーリンジャイトknorringite Mg₃Cr₂Si₃O₁₂とSiの一部を4(OH)が置換したハイドログロッシュラーhydrogrossular Ca₃Al₂Si₂O₈(SiO₄)_1～m(OH)_4mである。またTiの多いアンドラダイトはメラナイトmelaniteと呼ばれている。…