COSALITE FROM THE HAGIDAIRA MINE, GUN′MA PREFECTURE, JAPAN
1961 年 3 巻 3 号 p. 148-155
詳細
1961 年 3 巻 3 号 p. 148-155
A new mode of occurrence of cosalite from Japan and its mineralogical properties are described. The mineral was identified by X-ray studies and chemical analyses. It occurs in a bedded type manganese deposit in a Palaeozoic formation. Acicular crystals were found in a vug of rhodonite with quartz or growing on the surface of quartz crystals. The cosalite is associated with such metallic minerals as gersdorffite, niccolite, huebnerite, scheelite, sphalerite, galena, pyrrhotite, uraninite, etc., as well as manganese minerals.
X-ray and crystallographic data, optical properties, etch tests and chemical analysis are presented. Cell constants: a0=19.09Å., b0=23.89Å. and c0=4.058Å. Space group: D162h-Pbnm.
