Direct solid-state synthesis at high pressures of new mixed-metal oxynitrides: RZrO(2)N (R = Pr, Nd, and Sm).
New oxynitrides of RZrO(2)N (R = Pr, Nd, and Sm) have been synthesized via a direct solid-state reaction of R(2)O(3) with Zr(2)ON(2) at 1200-1500 degrees C under 2-3 GPa pressure. Powder X-ray diffraction shows that all three phases adopt an orthorhombic Pnma perovskite superstructure [a = 5.8537(1) A, b = 8.1707(1) A, and c = 5.7093(1) A for NdZrO(2)N] and the structural distortion increases with decreasing R(3+) ionic radius. This method may enable new mixed-metal oxynitrides to be synthesized without the use of nitriding gas atmospheres.
Yang
Minghui
M
CSEC and School of Chemistry, University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom.
Rodgers
Jennifer A
JA
Middler
Lawrence C
LC
Oró-Solé
Judith
J
Jorge
A Belén
AB
Fuertes
Amparo
A
Attfield
J Paul
JP