hirnantite是什么意思

用法例句

The K-Ar isotope age of albite phenocryst in albitophyre vein is 372Ma,while that of the ground mas.

钠长斑岩中钠长石的Ｋ－Ａｒ年龄为３７２Ｍａ，基质年龄为３３７Ｍａ。