
{"publication_number": "US-6491753-B2", "abstract": "to obtain large , high - quality crystals of a metal orthophosphate , in particular gapo 4 or alpo 4 , from a nutrient solution with the use of seeds , a seed crystal is used having at least two rod - or wafer - shaped legs which form an angle with each other and define a main growth region , and which are positioned eccentrically in the single crystal grown . contagious faces of two seed legs , which have been chosen for crystal growing , enclose an angle & lt ; 180 \u00b0. in this way the yield of the high - quality crystal region will be increased .", "application_number": "US-74821300-A", "description": "as a general rule the faces of the legs of the seed crystal need not be identical with the crystallographic faces . in particular , faces that are tautozonal to the direction of the legs of a seed crystal may be used . tautozonal faces include all faces whose normal vectors are in one and the same plane . the normal vector of this plane is indicated by the zone symbol just like the crystal directions in table 1 . for example , the family of faces tautozonal to the y - axis [ 0 1 { overscore ( 1 )