2．地球表層鉱物（地圏物質）
フランボイダルパイライト
－天然における鉱物の不思議な自己組織化作用－
2011 年 53 巻 1 号 p. 46-51
詳細
2011 年 53 巻 1 号 p. 46-51
The 3D packing structures of the microcrystals in framboidal pyrite have been studied through morphological examinations and crystallographic orientation analysis to understand the self-organization process. The structures are divided into (i) face-centered cubic, (ii) icosahedral and (iii) random packings. The detailed crystallography of pyrite framboids is characterized by high-angle (∼90°) misorientations shown by about a half of the microcrystals in a framboid. This means that the crystallographic orientation of microcrystals is not uniform even in highly ordered framboids, suggesting that their self-organization process is not crystallographically controlled, but occurs by the physical rotation of individual microcrystals.
