LAUMONTITE IN AN ANDESITE FROM KINZAN, SATSUMA-CHO, KAGOSHIMA PREFECTURE

Abstract

A laumontite occurs in the cracks of an andesite at Kinzan, Satsuma-cho, Kagoshima Prefecture. Alkali content of the laumontite is higher than that of laumontites reported in Japan so far. Unit-cell constants calculated from x-ray powder data are very close to those of reported laumontites; a=14.765±0.007Å, b=13.135±0.005Å, c=7.561±0.004Å and β=111.766±0.04°