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  • Title: High pressure orthorhombic structure of CuInSe2.
    Author: Bovornratanaraks T, Saengsuwan V, Yoodee K, McMahon MI, Hejny C, Ruffolo D.
    Journal: J Phys Condens Matter; 2010 Sep 08; 22(35):355801. PubMed ID: 21403297.
    Abstract:
    The structural behaviour of CuInSe(2) under high pressure has been studied up to 53 GPa using angle-dispersive x-ray powder diffraction techniques. The previously reported structural phase transition from its ambient pressure tetragonal structure to a high pressure phase with a NaCl-like cubic structure at 7.6 GPa has been confirmed. On further compression, another structural phase transition is observed at 39 GPa. A full structural study of this high pressure phase has been carried out and the high pressure structure has been identified as orthorhombic with space group Cmcm and lattice parameters a = 4.867(8) Å, b = 5.023(8) Å and c = 4.980(3) Å at 53.2(2) GPa. This phase transition behaviour is similar to those of analogous binary and trinary semiconductors, where the orthorhombic Cmcm structure can also be viewed as a distortion of the cubic NaCl-type structure.
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