Crystals are grown by the floating zone method inside quartz reactors 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 20 mm2 depending on the composition
Several cleavages are possible and more samples can be extracted from one single crystal. Crystals cleave along the hexagonal plane for all compositions.
As-grown whole crystalline boules (2-5 grams) can be purchased on demand with a 3 months delivery delay.
X-ray Laue and Bragg diffraction patterns are provided with the crystals