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Synthesis, crystal structure and magnetic properties of Li0.44Eu3[B3N6]

MPS-Authors
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Aydemir,  U.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Prots,  Y.
Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Förster,  T.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Sichelschmidt,  J.
Jörg Sichelschmidt, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Auffermann,  G.
Gudrun Auffermann, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  W.
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Kokal, I., Aydemir, U., Prots, Y., Förster, T., Sichelschmidt, J., Yahyaoglu, M., et al. (2014). Synthesis, crystal structure and magnetic properties of Li0.44Eu3[B3N6]. Journal of Solid State Chemistry, 210(1), 96-101. doi:10.1016/j.jssc.2013.11.001.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0017-B58C-D
Abstract
Li0.44Eu3[B3N6] was synthesized from the metathesis reaction of Li-3[BN2] and EuCI3 at 850 degrees C. Li0.44EU3-[B3N6] crystallizes in the trigonal space group R (3) over barc (No. 167) with a=12.0225(2) angstrom, c=6.8556(2) angstrom and Z=6. In the crystal structure, isolated, planar cyclic [B3N6](9-) units are charge-balanced by the mixed-valence Eu3+/Eu2+ and Li+ cations. Li+ occupies partially (44%) the Wyckoff site 6b and is sandwiched between the [B3N6](9-) anions. Mossbauer spectroscopy results show the resonance lines of Eu2+ and Eu3+, respectively, indicating the heterogeneous mixed valency of the Eu atoms. X-Band ESR investigations between 5 and 300 K reveal an intense signal over the whole temperature range originating from Eu2+. Magnetic susceptibility measurements indicate a Curie-Weiss behavior with an experimental effective magnetic moment of (mu eff)=8.28 (mu B) per formula unit. (C) 2013 Elsevier Inc. All rights reserved.