NQR study of ternary chalcogenides A3BX3, ABX2, and ABX where A = Cu,Ag, or TI, B = As or Sb,and X = S or Se |
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Authors: | T.J. Bastow H.J. Whitfield |
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Affiliation: | CSIRO Division of Chemical Physics, P.O. Box 160, Clayton, Victoria 3168, Australia |
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Abstract: | 121Sb, 123Sb, 75As, 63Cu, and 65Cu NQR resonances are reported for CuSbSe2, Tl3SbSe3, Tl3SbS3, Tl3AsS3, Tl3AsSe3, Ag3AsSe3, TlSbS2, CuAsS, AgAsS, and Cu5SbS3I2. Tl3SbSe3 is an incongruently melting compound not observed in an earlier phase-diagram study of the pseudobinary system Tl2SeSb2Se3. For isostructural arsenic and antimony chalcogenides the ratio of 75As to 121Sb quadrupole coupling constants is 0.42, and for the BX3 group in binary or ternary corresponding pairs of sulfide and selenides the ratio of quadrupole coupling constants for 75As or 121Sb is 0.83. A reversible phase transition was observed at 130 K for Ag3AsSe3. Unit cell parameters are reported for crystals of TlSbS2 and Cu5SbS3I2. |
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