...The hemimorphite from the Kinoura mine in Oita Prefecture is beautiful. In Franklin, New Jersey, USA, zincite ZnO (pure ZnO is white, but naturally occurring zinc is red because it contains impurities such as Mn), franklinite (Zn,Fe,Mn)(Fe,Mn) 2 O 4 (same structure as magnetite Fe 3 O 4 ), willemite Zn 2 SiO 4 (also called zinc silicate, hexagonal crystal system. Olivine Mg 2 SiO 4 , which has a similar chemical composition, is orthorhombic and has a different structure), and other materials are produced, and it is said that the oxidation zone of the zinc deposit has been metamorphosed. ... *Some of the terminology that mentions "Willemite" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…大分県木浦鉱山の異極鉱は美晶である。アメリカのニュージャージー州フランクリンには紅亜鉛鉱zincite ZnO(純粋のZnOは白色であるが,天然に産するものはMnなどの不純物を含み紅色である),フランクリン鉱franklinite (Zn,Fe,Mn)(Fe,Mn)2O4(磁鉄鉱Fe3O4と同構造),ウィレマイトwillemite Zn2SiO4(ケイ酸亜鉛鉱ともいい,六方晶系。類似の化学組成をもつカンラン石Mg2SiO4は斜方晶系で,構造が異なる)などを産し,亜鉛鉱床の酸化帯が変成作用を受けたものといわれている。… ※「ウィレマイト」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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