Abstract
Kimzeyite solid solution series (Ca3Zr2Al2SiO12–Ca3Zr2Fe2SiO12 abbreviated to Al100Fe0–Al0Fe100) have been investigated by hydrothermal syntheses and X-ray powder diffraction. The latter confirmed the splitting or broadening of the diffraction peaks on the specimens with the initial composition Al50Fe50 and quenched from the temperature below 650°C. The electron microprobe analyses were also carried out and indicated the existence of two kinds of crystal grains of kimzeyite, each having a different composition. The cell dimensions calculated from the peaks of X-ray powder diffraction concluded that the splitting or broadening of these peaks is ascribed to the existence of two exsolved garnet phases both having a cubic symmetry. The existence of an exsolution region below 650°C in kimzeyite solid solution series has been confirmed.
