High pressure synthesis of molybdenum nitride MoN

Molybdenum nitride was synthesized by the reduction of molybdenum dioxide w ith ammonium chloride under extreme conditions of high pressure and high te mperature. The product was examined with XRD measurement. The results show that the MoN has the hexagonal symmetry with lattice constants of a=0.572(9 ) nm, c=0.560(4) nm, and space group of P6(3)/mmc. The Mo atoms are at the positions 2b(0,0,1/4) and 6h(x,2x,1/4), x=0.48(9), The N atoms are at the p ositions 2a(0,0,0) and 6g(0.5,0,0). This method has many advantages: the re action condition is very easily carried out, the product is pure phase, and the reaction time is short. (C) 2000 Elsevier Science S.A. All rights rese rved.