Norbergite

Japanese: norbergite
Norbergite

...A general term for the four rock-forming minerals belonging to the humite group: norbergite Mg 3 SiO 4 (OH) 2 (orthorhombic), chondrodite Mg 5 Si 2 O 8 (OH) 2 (monoclinic), humite Mg 7 Si 3 O 12 (OH) 2 (orthorhombic), and clinohumite Mg 9 Si 4 O 16 (OH) 2 (monoclinic). Humite group minerals are structurally closely related to each other, with layers of forsterite Mg 2 SiO 4 structure alternating with layers of brucite Mg(OH) 2 structure. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヒューマイト族に属する造岩鉱物,ノルベルジャイトnorbergite Mg3SiO4(OH)2(斜方晶系),コンドロダイトchondrodite Mg5Si2O8(OH)2(単斜晶系),ヒューマイトMg7Si3O12(OH)2(斜方晶系),クリノヒューマイトclinohumite Mg9Si4O16(OH)2(単斜晶系)の4種の総称およびその1種。ヒューマイト族鉱物は,構造的に互いに密接な関係があり,フォルステライトMg2SiO4構造をもつ層と,ブルーサイトMg(OH)2構造をもつ層とが互層している。…

※「norbergite」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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