Alumina Minerals

Japanese: アルミナ鉱物 - あるみなこうぶつ
Alumina Minerals

...Alnogen and halotrichite Fe 2 + Al 2 (SO 4 ) 4 ・22H 2 O are sulfate minerals, the decomposition products of clays containing iron sulfide minerals, and are found around the sulfur vents of hot spring areas, such as Owakudani in Hakone and Myoban Onsen in Beppu. When used as a high-grade refractory material or catalyst support, they have a composition of aluminum oxide and are called alumina minerals. [Minato Hideo]. ...

*Some of the terminology that mentions "alumina minerals" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このアルノーゲンおよび鉄ミョウバン石halotrichite Fe2+Al2(SO4)4・22H2Oは硫酸塩類鉱物として,硫化鉄鉱物を含む粘土類の分解生成物で,温泉地帯の硫気孔周辺,たとえば箱根大涌谷,別府明礬温泉などに産出する。 なお高級耐火物原料,触媒担体として取り扱われる場合は,酸化アルミニウムの組成であって,アルミナ鉱物と呼ばれる。【湊 秀雄】。…

※「アルミナ鉱物」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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