Research sponsored by Air Force Office of Scientific Research, Office of Aerospace Research, U. S. Air Force, Grant No. 806-65, and by National Institute of Health training grant in crystallography, 5T1DE 120-03. The crystal structure of NdTe3 has been determined from h0l and 0kl electron density projections and by a least-square refinement of these structure factors. All other reported lanthanide tritellurides are isostructural with it. The crystal is orthorhombic, pseudo-tetragonal, with a0 = b0 = 4.35 A and C0 = 25.80 A, space group Bmmb, with four molecules per unit cell. All four crystallographically independent atoms are in position 4(c), 0, 1/4, z, of Bmmb. The z parameters are 0.8306 (Nd), 0.0705 (Te), 0.4294 (Te), and 0.7047 (Te). The structure is closely related to that of LaTe2. The lanthanide atoms in both structures have identical coordination. The NdTe3 structure may be viewed as a stacking of NdTe2 unit cells with additional Te layers between cells and with alternate cells shifted by a0/2.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry