Mesure de la temperature de Debye de CsI par diffraction de rayons X
Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography
, Volume 30 (3): 409 – May 1, 1974
Abstract
The Debye temperature of powdered CsI has been measured at room temperature from continuous diffractometric recording of -filtered Cu K reflexions, using a dead-time correction formula Kouchkovsky, R. de (1974). Acta Cryst. A 30, 406-408 and taking into account the variation with Bragg angle of the K2/K1 intensity ratio. The value determined, 112 plus or minus 3DegreesK at 23 DegreesC, is slightly below the one that can be deduced from elastic moduli (115DegreesK), and in good agreement with the general theoretical predictions. Unfortunately, there is some discrepancy with the value calculated from a frequency distribution curve recently published.
