Zastosowanie spektroskopii Ramana do identyfikacji minerałów meteorytu NWA 4967

Carbonaceous chondrite NWA 4967 was investigated by confocal Raman micro-spectroscopy. Olivine (Fa0-68), orthopyroxene with high En95-100 and low enstatite content En25-58, clinopyroxene, plagioclase, withlockite, cristobalite, coesite, graphite and diamond have been identified and characterized. Two groups of olivines have been detected: one with high Fo content Fo80-100 and another with relatively high Fa content Fa30–68. Diamond is common and exhibits the wide range of Raman shift between 1298 and 1339 cm–1 with dominant peak at 1332 cm–1 as in the case of terrestrial diamonds. Distributions of Raman peaks for olivines and carbon phases have been analyzed.