Classification of ordinary chondrites using the X-ray diffraction method

Abstract

Ordinary chondrites were examined focusing on the practical classification from powder X-ray diffraction patterns.  Olivine compositions from the empirical formula correspond to each chemical group.  The types of 3 and 4, 5&6 are distinguished from the peak of the low-Ca clinopyroxene.  The relative intensity of troilite to kamacite is useful for the distinction of chemical group.  This would be applied for the irregular shaped ordinary chondrites.