K3Ln[OB(OH)2]2[HOPO3]2 (Ln=Yb, Lu): Layered rare-earth dihydrogen borate monohydrogen phosphates |
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| Authors: | Yan Zhou Stefan Hoffmann Yurii Prots Prashanth W Menezes Jörg Sichelschmidt Rüdiger Kniep |
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| Institution: | a Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
b Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, PR China |
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| Abstract: | Two isotypic layered rare-earth borate phosphates, K3LnOB(OH)2]2HOPO3]2 (Ln=Yb, Lu), were synthesized hydrothermally and the crystal structures were determined by single-crystal X-ray diffraction (R3?, Z=3, Yb: a=5.6809(2) Å, c=36.594(5) Å, V=1022.8(2) Å3, Lu: a=5.6668(2) Å, c=36.692(2) Å, V=1020.4(1) Å3). The crystal structure can be described in terms of stacking of Glaserite-type slabs consisting of LnO6 octahedra interlinked by phosphate tetrahedra and additional layers of OB(OH)2]- separated by K+ ions. Field and temperature dependent measurements of the magnetic susceptibility of the Yb-compound revealed Curie-Weiss paramagnetic behavior above 120 K (μeff=4.7 μB). Magnetic ordering was not observed down to 1.8 K. |
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| Keywords: | Rare earth Borate phosphate Layered structure Magnetic properties EPR spectroscopy |
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