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Effective Reduction of the Unit Cell for the Interpretation of the Optical Properties of Monoclinic Molecular Crystals with Four Molecules in the Unit Cell: 1,5‐Dichloroanthracene
Author(s) -
Flakus H.
Publication year - 1975
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.2220710138
Subject(s) - monoclinic crystal system , molecule , unit (ring theory) , crystal (programming language) , materials science , symmetry operation , crystallography , symmetry (geometry) , equivalence (formal languages) , primitive cell , molecular physics , crystal structure , chemistry , physics , quantum mechanics , mathematics , computer science , geometry , pure mathematics , mathematics education , programming language
It is shown that symmetry considerations allow to interpret the spectral properties of the 1,5‐dichloroanthracene molecular crystal which contains four molecules in the unit cell by using an effective optical unit cell with only two molecules. The numerical computations performed for the models of vibronic coupling in the crystals with respectively two and four molecules in the unit cell confirm the equivalence of the models. For the crystals having the C j site symmetry group and four molecules in the unit cell of the monoclinic system the equivalence of considerations of those crystals is demonstrated.