Method of preparation of crystals of the class of a point 32 and of different chemical empirical formula has bo4

摘要

In a process for producing crystals in crystallographic point group 32 and corresponding to the comprehensive chemical formula APO4, wherein symbol A is a chemical element taken from the group Al and Ga, P is phosphorus and O is oxygen, from heated solutions of salts of group A in phosphorus acid, the application of acid concentrations within the range of 12.5 to 20 mol/l, solution temperatures within the range of 110 DEG to 190 DEG C. and total pressures within the range of prevailing static vapour pressure to 2.5 bar provides a simple, safe and cost-effective method of producing perfect, flawless crystals.