ARC MELTING SYNTHESIS AND PROPERTIES OF P EROVSKITE-TYPE HORH3B

Polycrystalline specimens of HoRh3B1-x, which consists of high reactiv e (He) and melting (Rh, B) elements, have been successfully synthesize d by are melting method. Extreme evaporation of the constituent elemen ts has not been observed. Compound of HoRh3B1-x has perovskite type cu bic structure (space group: Pm3m). The concentration of boron is distr ibuted between x = 0 (20 atom%B) and 0.506 (11 atom%B) for HoRhaB(1-x) . Lattice parameter of alpha in HoRh3B1-x depends on x, and varies lin eary from alpha = 41.51(1) nm (x = 0) to 40.71(1) nm (x = 0.506). This compound shows paramagnetic behavior following the Curie-Weiss law be tween 4.2 and 300 K. Almost the same effective magnetic moments of 10. 44 and 10.40(mu B) in x = 0 (20 atom%B) and 0.294 (15 atom%B), respect ively, are in good agreement with the theoretical Hund value of 10.60( mu B) for Ho+3.