Abstract
Platelet-like kassite, a rare mineral CaTi 2 O 4 (OH) 2 , was synthesized by a wet chemical route using Ca(OH) 2 and TiO 2 as reagents in base solution. The microstructure of the obtained kassite examined by synchrotron radiation and Rietveld refinement are hexagonal (P312) with a = b = 0.52451(2) and c = 0.47844(3) nm. This cell is slightly different from JCPDS No. 88-1722. At heating above 500 °C, the layered crystalline kassite rearranges to form, disk-like CaTiO 3 and amorphous TiO 2 by removing H 2 O completely. Furthermore, transmission electron microscopy analysis reveals that the vertical axis of disk-like CaTiO 3 along the [021] direction converts from that of [001] of kassite. © 2010 American Chemical Society.