Author:
Bastow TJ,Campbell ID,Whitfield HJ
Abstract
The nuclear quadrupole
resonance frequencies of 75As in the α and β forms of As4S3
have been measured at 77, 195, and 293 K. The frequencies at 77 K were:
α phase 64.87 65.94 79.56 MHz
β phase 65.42 67.16 79.65 MHz
An analysis is presented in
terms of Townes-Dailey theory and of the temperature
dependence in terms of Bayer-Brown theory. The differences in frequencies of
the α and β forms were attributed to the effect of electrostatic
field gradients, estimated by lattice sums. Allowance must be made for the
thermal expansion of the lattice to obtain a consistent interpretation.
Cited by
16 articles.
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