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Syntheses, Crystal Structures, and Optical and Magnetic Properties of Some CsLnCoQ 3 Compounds (Ln = Tm and Yb, Q = S; Ln = Ho and Yb, Q = Se)
Author(s) -
Chan George H.,
Sherry Leif J.,
Van Duyne Richard P.,
Ibers James A.
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700179
Subject(s) - isostructural , orthorhombic crystal system , antiferromagnetism , crystallography , paramagnetism , crystal structure , space group , materials science , lanthanide , infrared , band gap , chemistry , condensed matter physics , x ray crystallography , physics , diffraction , optics , ion , organic chemistry , optoelectronics
Abstract The four new compounds CsTmCoS 3 , CsYbCoS 3 , CsHoCoSe 3 , and CsYbCoSe 3 have been synthesized at 1123 K. These black‐colored isostructural compounds crystallize in the KZrCuS 3 structure type with four formula units in space group Cmcm of the orthorhombic system. The structure of these compounds is composed of $^{2}_{\infty}\rm [LnCoQ_{3})^{-}]$ layers separated by Cs atoms. Because there are no Q–Q bonds, the formal oxidation states of Cs/Ln/Co/Q are 1+/3+/2+/2−, respectively. CsHoCoSe 3 shows paramagnetic behavior with μ eff = 11.9(1) μ B , whereas CsYbCoS 3 displays an antiferromagnetic‐like transition at ∼2.7 K with μ eff = 5.85(1) μ B . Both CsYbCoS 3 and CsYbCoSe 3 exhibit optical band gaps in the near infrared region and broad absorption bands at lower energies.