Lattice Parameters, Thermal Expansion Coefficients, Phase Width, and Perfection of the Structure of GaSb and InSb

Abstract

The lattice parameters of GaSb and InSb, prepared from 99.999% pure elements, were redetermined: a_25° of GaSb was 6.0959₃±0.00004 Å and a_25° of InSb was 6.4793₇±0.00003 Å (with the refraction correction included). Any width of the GaSb and InSb phases could not be detected. The expansion coefficients of the two compounds between 10° and 70°C were (7.75±0.50)×10⁻⁶ and (5.37±0.50)×10⁻⁶ °C⁻¹, respectively. The experimental density d₂₅ of GaSb was 5.6137±0.0004 and that of InSb 5.7747±0.0004 g·cm⁻³. In both cases, the actual number of molecules n′ per unit cell was very close to 4.0000 (within the limits of error), indicating that the structure of both compounds is sound or perfect.