The Variations of Structure of Garnet

This paper discusses the microvaried regularities of garnet type crystal structures,in terms of the characterized ions coordinate,during the composition change.The sites occupied by X、Y and Z cations in the garnet unit cell are special sites.These sites are therefore fixed.The Oxygens,on the other hand,occupy the general sites.As composition or temperature is change,only coordinate （u、v、w） of O ions value change,and that causes the change of whole structure.Some diagrams are presented,including the diagrams of correlation between the u value and the （v/w）,w value and uv/（u-v）.On the basis of the above discussion,some regularities are presented.