A new structure type of RE{sub 4}B{sub 4}O{sub 11}F{sub 2}: High-pressure synthesis and crystal structure of La{sub 4}B{sub 4}O{sub 11}F{sub 2}

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.06.019· OSTI ID:21432465

Haberer, Almut ^[1]; Kaindl, Reinhard ^[2]; Oeckler, Oliver ^[3]; Huppertz, Hubert ^[1]

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1. Institut fuer Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52a, A-6020 Innsbruck (Austria)
2. Institut fuer Mineralogie und Petrographie, Leopold-Franzens-Universitaet Innsbruck, Innrain 52, A-6020 Innsbruck (Austria)
3. Department Chemie, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5-13, D-81377 Muenchen (Germany)

The first lanthanum fluoride borate La{sub 4}B{sub 4}O{sub 11}F{sub 2} was obtained in a Walker-type multianvil apparatus at 6 GPa and 1300 {sup o}C. La{sub 4}B{sub 4}O{sub 11}F{sub 2} crystallizes in the monoclinic space group P2{sub 1}/c with the lattice parameters a=778.1(2) pm, b=3573.3(7) pm, c=765.7(2) pm, {beta}=113.92(3){sup o} (Z=8), and represents a new structure type in the class of compounds with the composition RE{sub 4}B{sub 4}O{sub 11}F{sub 2}. The crystal structure contains BO{sub 4}-tetrahedra interconnected with two BO{sub 3}-groups via common vertices, B{sub 2}O{sub 5}-pyroborate units, and isolated BO{sub 3}-groups. The structure shows a wave-like modulation along the b-axis. The crystal structure and properties of La{sub 4}B{sub 4}O{sub 11}F{sub 2} are discussed and compared to Gd{sub 4}B{sub 4}O{sub 11}F{sub 2}. - Graphical abstract: A new structure type of RE{sub 4}B{sub 4}O{sub 11}F{sub 2}: high-pressure synthesis and crystal structure of La{sub 4}B{sub 4}O{sub 11}F{sub 2}.

• OSTI ID: 21432465
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 9; Other Information: DOI: 10.1016/j.jssc.2010.06.019; PII: S0022-4596(10)00270-7; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORATES
LANTHANUM FLUORIDES
LATTICE PARAMETERS
MONOCLINIC LATTICES
PRESSURE RANGE GIGA PA
SPACE GROUPS
SYNTHESIS
TEMPERATURE RANGE 1000-4000 K
BORON COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LANTHANUM COMPOUNDS
OXYGEN COMPOUNDS
PRESSURE RANGE
RARE EARTH COMPOUNDS
SYMMETRY GROUPS
TEMPERATURE RANGE