The crystal structure of ScNbN 1- x and comparisons with related nitride and carbide structures
Abstract
A ternary nitride phase, ScNbN 1- x, was prepared by nitridation of ScNb alloys. X-ray powder diffraction analysis yielded the following structure model: space group {P6 3}/{mmc} (No. 194) with the lattice parameters a = 0.30633(6) and c = 1.05702(35) nm; 2 Sc atoms in 2(a), 2 Nb atoms in 2(d), and 4 N atoms in 4(f) with z ≈ {1}/{8} and a random occupancy of 50%. The stacking sequence of the metal atoms can be described by ABAC, ABAC, … The structure can be described as an anti-TiAs-type structure. Several similarities between the ScNbN structure and those of binary and ternary nitride and carbide phases are discussed.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- October 1989
- DOI:
- 10.1016/0022-4596(89)90282-X
- Bibcode:
- 1989JSSCh..82..186L