Hydrophlogopite from the Wakamtsu chromite mine, Tottori Prefecture

Abstract

Hydrophlogopite apperas at a contact zone between a diorite dyke and harzburgite in the Chgiri level of 7th deposits of the Wakamatsu mine. It is believed that the hydrophlogopite is the product of hydrothermal metamorphism related to igneous emanations. The chemical formula of the hydrophlogopite is shown in the present paper. It seems clear that the mineral is a regualr mixed layer type composed of phlogopite and vermiculite. The γ index of the present mineral is 1.6051, and the calculated value is 1.604. The lattice constant d (001) is 24.3 A.