Abstract
Infrared transmission spectroscopy is used to determine the amount of hydrogen in several kinds of Brazilian α-quartz. The experiments on the crystallographically oriented samples were used for the first time to verify the applicability of Paterson's formula (M. S. Paterson, Bull. Mineral. 105, 20, 1982) using the appropriate orientational factors for polarized and unpolarized radiations. The use of crystallographically oriented samples also allowed us to determine the average preferential direction of the OH dipoles which make an angle of 71° with respect to the optic axis. The hydrogen concentration in the 1st-quality layer of Brazilian quartz was found to be below 70 ppm.
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