Crystal structural features of hydrous forsterite: Effect of Fe on the M-site vacancies, possible hydrogen positions and variation of the unit cell dimensions
Abstract:A qualitative understanding of the incorporation of hydrogen atoms in forsterite and corresponding octahedral vacancies are given from the inspection of the crystal structure with the view point of minimum strain configuration. In the case of Fe -free hydrous forsterite, the structural strain from the ideal size is larger in the M1 site than in the M2 site. Two H atoms may replace the Mg atom predominantly at the M1 site to reduce the structural strain, giving the vacancy at the M1 site. In the case of Fe -bea… Show more
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