Lattice Parameter Study in the Bi1–xSbx Solid‐solution System

The lattice parameters of Bi 1– x Sb x single crystals were measured for 0 ≦ x ≦ 1 by a special X‐ray diffractometer technique using reflections chosen so that minimum errors were achieved. Corrections for thermal expansion and refraction were applied. The antimony concentration was determined by means of electron microprobe analysis. The dependences of the lattice parameters on x (in nm) can be described with good approximation by a = 0.45469 – 0.02398 x and c = 1.186294 – 0.058632 [1 + 1.26 ( x −1 – 1)] −1 , resp. The behaviour of the parameter a is in agreement with the earlier study by C UCKA and B ARRETT , whereas their linear expression for c ( x ) (0 ≦ x ≦ 0.3) was not confirmed.