Crystal structures of low- and high-temperature modifications of Cu2CdGeSe4
作者： LD Gulay , Ya E Romanyuk , OV Parasyuk , None
DOI: 10.1016/S0925-8388(02)00790-9
关键词: Anisotropy 、 Crystallography 、 Orthorhombic crystal system 、 Lattice (order) 、 Phase transition 、 X-ray crystallography 、 Intermetallic 、 Chemistry 、 Tetragonal crystal system 、 Crystal structure
摘要: Abstract The Cu2CdGeSe4 compound melts incongruently at 1103 K and shows a polymorphous transformation. crystal structures of both (LT HT) modifications the were determined using X-ray powder single diffraction, respectively. LT-Cu2CdGeSe4 has tetragonal structure (space group I 4 2m, a=0.57482(2), c=1.10533(3) nm, RI=0.0571 in isotropic approximation). HT-Cu2CdGeSe4 crystallizes orthorhombic space Pmn21 (lattice parameters a=0.80968(9), b=0.68929(6) c=0.66264(6) RF=0.0446 anisotropic Some peculiarities tetragonal⇔orthorhombic transformation are discussed.
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