Gd{sub 4}B{sub 4}O{sub 11}F{sub 2}: Synthesis and crystal structure of a rare-earth fluoride borate exhibiting a new 'fundamental building block' in borate chemistry

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.12.003· OSTI ID:21372507

Haberer, Almut ^[1]; Kaindl, Reinhard ^[2]; 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)

A new gadolinium fluoride borate Gd{sub 4}B{sub 4}O{sub 11}F{sub 2} was yielded in a Walker-type multianvil apparatus at 7.5 GPa and 1100 deg. C. Gd{sub 4}B{sub 4}O{sub 11}F{sub 2} crystallizes monoclinically in the space group C2/c with the lattice parameters a=1361.3(3) pm, b=464.2(2) pm, c=1374.1(3) pm, and beta=91.32(3){sup o} (Z=4). The crystal structure exhibits a structural motif not yet reported from borate chemistry: two BO{sub 4}-tetrahedra (square) and two BO{sub 3}-groups (DELTA) are connected via common corners, leading to the fundamental building block 2DELTA2square:DELTAsquaresquareDELTA. In the two crystallographically identical BO{sub 4}-tetrahedra, a distortion resulting in a very long B-O-bond is found. - Graphical abstract: A new gadolinium fluoride borate Gd{sub 4}B{sub 4}O{sub 11}F{sub 2} could be synthesized via high-pressure/high-temperature synthesis (multianvil technique). The crystal structure exhibits a structural motif not yet reported from borate chemistry: two BO{sub 4}-tetrahedra (square) and two BO{sub 3}-groups (DELTA) are connected via common corners, leading to the fundamental building block 2DELTA2square:DELTAsquaresquareDELTA.

• OSTI ID: 21372507
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 2; Other Information: DOI: 10.1016/j.jssc.2009.12.003; PII: S0022-4596(09)00566-0; Copyright (c) 2009 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
GADOLINIUM 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
GADOLINIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PRESSURE RANGE
RARE EARTH COMPOUNDS
SYMMETRY GROUPS
TEMPERATURE RANGE