Ordinary chondrite NWA 4505 was investigated by confocal Raman micro-spectroscopy. Olivine (Fa0–22), orthopyroxene (Fs6–26), anorthoclase, HT plagioclase, whitlockite, graphite and diamond have been identified. Olivine and orthopyroxene are common and exhibit wide range of Raman shift. Distributions of Raman peaks for olivines and pyroxenes have been analyzed. Narrow, well defined bands of low Ca pyroxenes and olivines indicate on the high structural order and on the high petrologic type of chondrite. The wide range of Fa content in olivine and Fs in pyroxene may indicate that NWA 4505 is an unequilibrated ordinary chondrite.
Ordinary chondrite NWA 4047 was investigated by confocal Raman microspectroscopy to identify the extraterrestrial minerals. Olivines, orthopyroxenes, clinopyroxenes, plagioclase, graphite and diamond have been identified and characterized.
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