From Online Dictionary of Crystallography
Quartz droit (Fr). Quarzo destrogiro (It). 右石英 (Ja). Cuarzo diestro (Sp).
In 1811, D. F. J. Arago found the optical activity of the quartz plate prepared by cutting the crystal into slices perpendicular to the c axis. In 1819, J.-B. Biot examined the quartz plates by a polarimeter to recognize that there are dextrorotatory and laevorotatory quartz. The absolute structure of the dextrorotatory quartz was determined by X-ray anomalous scattering in 1958 by A. De Vries to establish the relationship that the dextrorotatory quartz has 32 screw axes.
- Glazer, A. M. (2018). J. Appl. Cryst. 51, 915–918. Confusion over the description of the quartz structure yet again