Crystals grown by the Chemical Vapor Transport (CVT) method under vacuum. As-grown crystals are sold; nevertheless dedicated post-annealing treatment can be done on demand.
The size of single crystals ranges from 1 mm2 to 15 mm2 depending on the composition
Several cleavages are possible and more devices can be extracted from one single crystal. Crystals cleave along the rhombohedral a-b plane for all compositions.
X-ray Laue and Bragg diffraction patterns are provided with the crystals