Synthesis and crystal structure of the high-pressure iron borate {alpha}-FeB{sub 2}O{sub 4}
- Department Chemie und Biochemie, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5-13, D-81377 Muenchen (Germany)
- Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52a, A-6020 Innsbruck (Austria)
The high-pressure iron borate {alpha}-FeB{sub 2}O{sub 4} was synthesized under high-pressure and high-temperature conditions in a Walker-type multianvil apparatus at 7.5 GPa and 1100 deg. C. The monoclinic iron borate crystallizes with eight formula units in the space group P2{sub 1}/c with the lattice parameters a=715.2(2), b=744.5(2), c=862.3(2) pm, and {beta}=94.71(3){sup o}. The compound is built up exclusively from corner-sharing BO{sub 4}-tetrahedra, isotypic to the monoclinic phases {beta}-SrGa{sub 2}O{sub 4}, CaAl{sub 2}O{sub 4}-II, and CaGa{sub 2}O{sub 4}. Additionally, the structure is closely related to the orthorhombic compound BaFe{sub 2}O{sub 4}. The structure consists of layers of six-membered rings, which are interconnected to a three-dimensional network. The iron cations are coordinated by six and seven oxygen atoms. Next to synthesis and crystal structure of the new high-pressure borate, structural coherences to other structure types are discussed. - Abstract: High-pressure/high-temperature synthesis (multianvil technique) led to the new phase {alpha}-FeB{sub 2}O{sub 4}, which is exclusively built up from corner-sharing BO{sub 4}-tetrahedra, isotypic to the monoclinic phases {beta}-SrGa{sub 2}O{sub 4}, CaAl{sub 2}O{sub 4}-II, and CaGa{sub 2}O{sub 4}. Display Omitted.
- OSTI ID:
- 21128415
- Journal Information:
- Journal of Solid State Chemistry, Vol. 181, Issue 8; Other Information: DOI: 10.1016/j.jssc.2008.05.016; PII: S0022-4596(08)00254-5; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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