Abstract
A new phase of ZrGeO4 was hydrothermally synthesized from a mixture of ZrOCl2 solution and GeO2 powder at 240°C. X‐ray diffractometry patterns of synthesized ZrGeO4 particles, which had better crystallinity than ZrSiO4 particles prepared by the same process from ZrOCl2 and tetraethoxysilane, could be indexed for a zircon‐type tetragonal structure, having a0= 0.6694(0) and c0= 0.6265(7) nm. The c/a ratio of synthesized ZrGeO4 (0.9360) was larger than that of ZrSiO4 (0.9054). Solid solutions with zircon‐type structure over the whole composition range in the ZrGeO4‐ZiSiO4 system were also directly synthesized through the same solution route. The secondary particle size of zircon‐type Zr(Ge,Si)O4 solid solutions decreased, and its morphology gradually changed from octahedron‐like to blood‐red cell‐like with decreased GeO2 content.
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