Abstract
A large volume of the perovskite-type CeMO3 (M=Al, Ga) are synthesized by the arc-melting method with a horizontal-traveling hearth under Ar stream. The colour of the product for the M=Al is dark green. Evaporation of the raw materials is not observed. The single phase region of CeAlO3 in volume of -3mm3 is obtained. In the case of M=Ga, the product is light grey in colour. The arc-melting procedure resulted in a loss of the raw material of Ga2O3, hence CeO2 is remained and distributed in the matrix of CeGaO3. As a result, the single phase region of CeGaO3 is not obtained. Both of CeAlO3 and CeGaO3 are crystallized in tetragonal structure (space group: P4/mmm) and number of molecules per unit cell, Z=1. The lattice parameters of a=0.37669(9)nm and c=0.37967(7)nm for CeAlO3, and a=0.3873(1)nm, c=0.3880(1)nm for CeGaO3, are obtained.
