“…However, calculations by Gray et al [15] have suggested, that hypothetic striations in Hg t _xCdxTe would rapidly decay by solid-state diffusion because of the high self-diffusion coefficient (D = 4.41 × 10 -t~ cm 2 s -~ at 500°C, x = 0.21 [16]). This is in agreement with the ACRT Bridgman growth experiments [10,12], which have used a growth rate of 0.5 mm h-~ and an ACRT sequence of spin-up for 8 s and spin-down of 1 s. The authors did not observe striations. In our experiments, if striations occur, the spacing from ACRT would lie in the same range, and should not be stable.…”