The X-ray debye temperatures of some II—VI compounds

The physical properties of cadmium telluride

“…Values of the Debye temperature 0, for CdTe have been obtained from several types of experimental data. Analyses of x-ray diffraction intensity data for 96 to 300 K by Walford and Schceifel [24] and for 281 to 608 K by Zubik and Valvoda [25] show that over these intervals the x-ray Debye temperature is close to 140 K, essentially independent of temperature. Birch [26] has determined the temperature dependence of 0, between 1.8 and 25 K from heat capacity data over this range.…”

X-ray Debye temperature of lead nitrate

“…The Debye temperatures derived from these slopes are therefore average values over the temperature range 298-525 °K and values obtained for (OM) are given in Table 1. An alternative way of averaging the temperature dependence of OM is through equation (4) of Walford & Schoeffel (1970) using Tl=298°K and T2=525°K. These results are also given in Table 1.…”

“…The corrected (TDS, Lp and absorption) intensities were used in equation (6) of Walford & Schoeffel (1970) to plot a graph of log I versus T for four reflexions of Pb(NOa)2. The graphs exhibit essentially the same behaviour, namely a straight line, and so the least-squares fittings were used to calculate the slopes.…”

“…In HgSe (Walford & Schoeffel, 1970) and in PbTe (Keffer, Hayes & Bienenstock, 1970), the cation in both cases has larger mass and possesses displacements about twice as large as that of the anion. A similar phenomenon was observed in Pb(NO3)2, where the larger-mass cation (Pb) has a larger displacement in about the same ratio as that found in HgSe and PbTe.…”

“…Recently this method has been described in detail by Walford & Schoeffel (1970) and has been used here to determine the root-mean-square displacements of the individual ions.…”