...There are several other polymorphic structures, including the monoclinic parawollastonite. At temperatures above 1150°C, it transforms into pseudowollastonite, which has a homogeneous heterocrystalline three-membered ring (SiO 3 ) 3 structure. It generally results from contact metamorphism by intrusive rocks in limestone, but can also result from high-grade regional metamorphism. *Some of the terminology that refers to "pseudowollastonite" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ほかに単斜晶系のパラケイ灰石parawollastoniteをはじめいくつかの多型構造がある。1150℃以上では同質異晶の3員環(SiO3)3構造をもつ偽ケイ灰石pseudowollastoniteに転移する。石灰岩中の貫入岩による接触変成作用から生ずるのが一般的で,高度の広域変成作用によっても生ずる。… ※「偽ケイ灰石」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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