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X-ray powder diffraction was carried out for fayalite, Fe2Si04, artificially prepared from the mixture of ferrous oxide and silica gel, and fairly complete data for fayalite was obtained.The effect of ferrous oxide on the transformation of silica gel into cristobalite and quartz, and the formation of solid solution of fayalite with the excess ferrous oxide are described and discussed.
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Yoshii et al. (1963) studied this question.
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