Characterization of two forms of cadmium phosphide by magic-angle spinning 31P NMR.
Annealing of commercial grade cadmium phosphide (CD3P2) at 600 K produces a material which, in magic-angle spinning spin-lattice 31P NMR relaxation experiments, has broad lines and multiple T1 values. By contrast, sublimation at 900 K results in a crystalline material with narrow lines and a single T1. However, both materials have the same Cd-P lattice spacings as determined by rotational-echo, double-resonance 31P NMR with 113Cd dephasing. Both materials also have closely similar X-ray diffraction powder patterns. These results are interpreted in terms of a distribution of lattice vacancies in the annealed material, creating structural heterogeneity but with no substantial change in lattice parameters from those of the sublimed cadmium phosphide.
Holl
S M
SM
Department of Chemistry, Washington University, St. Louis, MO 63130, USA.
Kowalewski
T
T
Schaefer
J
J
D002104:Cadmium / Q000737:chemistry*; D019187:Cadmium Compounds / Q000737:chemistry*; D003460:Crystallization; D003461:Crystallography; D004578:Electron Spin Resonance Spectroscopy; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D010720:Phosphines / Q000737:chemistry*; D010759:Phosphorus Isotopes; D014961:X-Ray Diffraction
D019187:Cadmium Compounds; D010720:Phosphines; D010759:Phosphorus Isotopes; D002104:Cadmium; C101567:cadmium phosphide