Elastic Constants of Hexagonal BeO, ZnS, and CdSe

Abstract

The elastic moduli of hexagonal beryllium oxide, zinc sulfide, and cadmium selenide at 25°C have been determined by measuring ultrasonic wave velocities in the 20- to 50-MHz frequency range. The data are compared with other literature data and discrepancies are discussed. The adiabatic bulk modulus, volume compressibility, and Debye temperatures are also computed.

High‐pressure X‐ray structural study of BeO and ZnO to 200 GPa

“…The bulk modulus for the B4 phase was determined to be 223 ± 4 GPa by the Birch's equation. The value is good agreement with the previous results determined by the X-ray diffraction study [14] or by the ultrasonic experiment [15]. Figure 3 shows the X-ray diffraction profile of ZnO to 202 GPa using the ADX.…”

Lattice dynamics of beryllium oxide: Inelastic x-ray scattering andab initiocalculations

“…Our results are in reasonable agreement with ultrasonic data 21 and previously performed first-principles calculation within the generalized gradient approximation of densityfunctional theory. 14 The bulk modulus derived from our data is also very close to the value obtained from a single-crystal compressibility experiment.…”

Lattice dynamics and related properties of AIBIII and AIIBIV compounds, I. Elastic constants

“…This method has the advantage that elastic constants can be derived from experiments on powdered material and has been successfully employed to investigate the elastic properties and their temperature dependence of the wurtzite structure compound BeO [94,95] with results being in very good agreement with elastic constants determined by ultrasonic wave velocity measurements [96]. The elastic constants obtained by this method for CuFeS 2 [97] are displayed in Table 7, together with elastic constants for the cubic and hexagonal phases of the binary analog ZnS and of hexagonal BeO added for comparison.…”