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Journal Article

Synthesis, single-crystal structure, and optical and magnetic properties of CaEr2S4

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Zeng,  H. Y.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Mattausch,  Hj.
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Huang,  J. S.
Research Group Solid State Nanophysics (Jurgen H. Smet), Max Planck Institute for Solid State Research, Max Planck Society;
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Zeng, H. Y., Mattausch, H., Zheng, F. K., Dong, Z. C., Guo, G. C., & Huang, J. S. (2007). Synthesis, single-crystal structure, and optical and magnetic properties of CaEr2S4. Chinese Journal of Structural Chemistry, 26(8), 973-979.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B4CB-2
Abstract
Brown needle-like crystals of CaEr2S4 were isolated as the major product from a reaction of elements and binary sulfides by a two-step flux technique. CaEr2S4 Crystallizes in the orthorhombic space group Pnma with a = 12.845(4), b = 3.862(4), c = 13.001(2) angstrom, V = 645.0(7) angstrom(3), Z = 4, F(000) = 880, mu(MoKa) = 27.794 mm(-1), the final R = 0.0528 and wR = 0.0562 for 1070 observed reflections with I > 3 sigma(I). The CaEr2S4 structure forms a three-dimensional framework that consists of interconnected tetra-octahedral Er4S18 fragments. Ca2+ cations, in a monocapped trigonal prism geometry, are stuffed in two parallel rows into the one-dimensional channels along the b direction. CaEr2S4 is an infrared-transparent semiconductor with a band gap of 1.81 eV. Magnetic susceptibility measurements over 6 similar to 300 K indicate a Curie-Weiss paramagnetic behavior for the phase, with an effective magnetic moment of 9.64(1) mu(B) per Er3+ ion.