Study of elastic behaviour of magnesium ferri aluminates

The elastic behaviour of MgAlxFe2-xO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) has been studied by infrared spectroscopy and X-ray diffraction analysis. The force constants for tetrahedral and octahedral sites determined by IR spectral analysis, lattice constant and X-ray are used to calculate elastic moduli-like bulk modulus, Young's Modulus, rigidity Modulus, Poisson's ratio and Debye temperature. The observed variation of elastic constants has been interpreted in terms of strength of interatomic bonding and electronic configuration of the cations involved in the system. The applicability of heterogeneous metal mixture rule has been tested; the agreements of the results obtained from the present method with the results of the other method confirm the validity of the methods used. (D 2005 (C) Elsevier Ltd and Techna Group Sx.l. All rights reserved.