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Lowering the symmetry group of carbon tetrachloride by high pressure
Author(s) -
Chen Yuanzheng,
Sun Shang,
Wu Yongling,
Gao Shuqin,
Li Zuowei,
Ouyang Shunli,
Li Dongfei,
Men Zhiwei,
Zhou Mi,
Sun Chenglin
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201248212
Subject(s) - depolarization ratio , carbon tetrachloride , raman spectroscopy , tetrachloride , anisotropy , antisymmetric relation , symmetry (geometry) , chemistry , polarization (electrochemistry) , molecule , isotropy , point reflection , spectral line , tetrahedron , molecular symmetry , molecular physics , nuclear magnetic resonance , crystallography , condensed matter physics , physics , organic chemistry , mathematical physics , mathematics , quantum mechanics , geometry , tin
Abstract Using the pressure‐induced polarized Raman spectra of carbon tetrachloride up to 22 GPa, a significant anomalous polarization (the depolarization ratio >0.75) was observed. We analyzed it by evaluating the antisymmetric anisotropy distribution of modes in T d and explored the corresponded molecular structure having been translated from T d into a lower symmetry. The P 2 1 / c and Pa 3 structures of carbon tetrachloride were optimized as a function of pressure to further confirm that the molecules deviated from regular tetrahedra. The C 2 v and D 2 were analyzed to be candidates of the lower symmetry based on group and Landau theory.