Hydrothermal growth of OH-free AlPO4 and GaPO4 crystals, the way of twin reducing O.V. ZVEREVA, Yu.M. MININZON et L.N. DEMIANETS J. Phys. IV France, 04 C2 (1994) C2-19-C2-24 DOI: 10.1051/jp4:1994203