Abstract
The electric field arising from K+ or Na+ in the “A” sites of synthetic hydroxyamphiboles of the richterite-tremolite series raises the stretching frequency of adjacent OH groups by about 60 cm−1. In natural amphiboles, however, the increase in frequency is generally only 20–40 cm−1, due, probably, to the effects of such substitutions as F for OH and Al for Si.
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Rowbotham, G., Farmer, V.C. The effect of “A” site occupancy upon the hydroxyl stretching frequency in clinoamphiboles. Contr. Mineral. and Petrol. 38, 147–149 (1973). https://doi.org/10.1007/BF00373878
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DOI: https://doi.org/10.1007/BF00373878