Quantitative analysis of the olivine content in chondrites has been carried out using X-ray diffraction. The procedure is applicable when the olivine contains 60-100 mole percent forsterite and can be used for terrestrial rocks as well. The average olivine contents of the H4, H5, and H6 petrologic types are very similar (approximately 28 percent) as are the average olivine contents of the L4, L5, and L6 (approximately 40 percent).

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