Optical anomalies in proustite resulting from a first-order structural phase transition
Baisa D. F., Kolendritskii D. D., Mal'tsev S. V.
A diffraction of light by the space lattice of a proustite crystal formed as a result of a first-order phase transition was observed for the first time. The diffraction occurs with the rotation of the polarization plane and without the rotation, depending on the polarization of the incident light and the orientation of the crystal.