Aluminian saponite - Aluminian saponite

Japanese: アルミニアンサポナイト - あるみにあんさぽないと
Aluminian saponite - Aluminian saponite

...A type of clay mineral, montmorillonite, that is rich in Mg. Its composition is (Ca/2,Na) 0.33 (Mg,Fe 2+ ) 3 (Si,Al) 4 O 10 (OH) 2 ・4H 2 O, but a type in which some of the Mg has been replaced with Al is called aluminian saponite. It belongs to the monoclinic crystal system and is clay-like, but under an electron microscope it appears as an amorphous thin film. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…粘土鉱物の一種モンモリロナイト族の中でMgに富む種。(Ca/2,Na)0.33(Mg,Fe2+)3(Si,Al)4O10(OH)2・4H2Oの組成であるが,Mgの一部をAlで置換した種をアルミニアンサポナイトと呼ぶ。単斜晶系に属し,粘土状を呈するが,電子顕微鏡下では不定形薄膜状の形態を示す。…

※「アルミニアンサポナイト」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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