Anharmonic contributions to Bragg diffraction. II. Alkali halides

Abstract

Anharmonic contributions to the atomic motion in the alkali halides KCI, NaCI, KBr and LiF have been determined from measurements of the elastic scattering of recoil-less ),-rays in the temperature range 300 to 1300 K. The results are compared with theoretical predictions.

Compilation of temperature factors of cubic compounds

“…123 (4) [12], [48] 148 (2) [2], [10], [12] 108 (4) [2], [12], [24], [ [22], [90], [102],[111] 160(I) [4], [6], [17], [22], [69],[901, [102],[111] 155 (2) [5], [7], [8], [26], [77], [79], [92], [98],[116] 206(I) [15], [20], [28], [36], [39], [62], [77], [92], [ (5) [5], [14], [91], [95] 594 (4) [60], [77], [81],[135],[137] 697 (10) [9], [13], [25], [32], [70], [ (2) [1], [20], [27],…”

Temperature dependence of atomic thermal parameters of lead chalcogenides, PbS, PbSe and PbTe

“…The thermal parameters of the Pb atoms have been observed to be larger than those of the X atoms, and anharmonic thermal vibration of the Pb atom has been detected in difference syntheses (Noda, Ohba, Sato & Saito, 1983). However, the thermal parameter of the heavier atom is smaller in sodium halides (Buyers & Smith, 1968;Martin & O'Connor, 1978). The temperature dependence of the thermal parameters of these semiconductors has been measured to confirm that the amplitude of the thermal vibration of Pb is larger than those of the lighter chalcogen atoms at room temperature.…”

Thermodynamics of lattice vibrations in non-cubic crystals: the zinc structure revisited

“…A similar fit function was used by Shepard et al (1998) for the B factors of alkali halides; see also Martin & O'Connor (1978b). In equation ( 13), m = 65.38 u is the atomic mass of zinc, and the Debye function D 1 ðdÞ is defined in (4).…”