…Also called monosulfite. A mineral with the chemical composition FeS. Refers to pyrrhotite with an iron to sulfur ratio of almost 1:1. Type 2C pyrrhotite. At temperatures above 140°C, it transforms into type 1C pyrrhotite. Hexagonal crystal system. Color, luster, hardness, cleavage, etc. are the same as pyrrhotite. Specific gravity 4.65. Nonmagnetic. Named after Dominico Troili, who first discovered it in meteorites. It is one of the main constituent minerals of meteorites, and is present in most meteorites at less than a few percent. In chondrites, it surrounds silicate minerals along with metallic iron, and in iron meteorites, it exists as granules in the metallic phase. … *Some of the terminology explanations that mention "Troili, D." are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…単硫鉄鉱ともいう。化学組成FeSの鉱物。磁硫鉄鉱のうち,鉄と硫黄の比がほとんど1:1のものをいう。2C型磁硫鉄鉱。140℃以上では転移して1C型磁硫鉄鉱となる。六方晶系。色,光沢,硬度,へき開等は磁硫鉄鉱に同じ。比重4.65。磁性はない。隕石中に最初に発見したトロイリDominico Troiliにちなんで命名。隕石の主要な構成鉱物の一つで,ほとんどの隕石に数%以下含まれる。コンドライト中では金属鉄とともにケイ酸塩鉱物を囲み,鉄隕石中では金属相の中に粒状に存在する。… ※「Troili,D.」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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