Prediction of Faint-B_g Frequencies in External Lattice Vibration in Scheelites by the Least Square Method
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概要
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Frequencies of the faint Bg modes, which have been missing or reported differently by different authors, are predicted by minimizing the least square deviations of all the six external-mode frequencies. For CaWO4, CaMoO4, BaWO4 and BaMoO4, the reasonable assignment is the combination of the two types of assignments hitherto reported. The Bg frequencies in SrWO4, NaReO4, RbReO4 and AgReO4, which have not been observed, are predicted. The results show that the faint Bg modes have the highest frequencies of external modes. Dispersion relations and elastic-wave velocities are obtained using the frequencies predicted above. The velocities predicted for CaMoO4 coincide better with observed values than those corresponding to the frequencies already reported.
- 社団法人日本物理学会の論文
- 1975-06-15
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