Synthesis, structural characterization and optical properties of a new cesium aluminum borate, Cs{sub 2}Al{sub 2}B{sub 2}O{sub 7}

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.10.023· OSTI ID:21612839

Kai, Feng; Wenlong, Yin ^[1]; Yicheng, Wu ^[1]

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1. Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

A new borate, Cs{sub 2}Al{sub 2}B{sub 2}O{sub 7}, was synthesized by solid-state reaction. It crystallizes in the monoclinic space group P2{sub 1}/c with a=6.719(1) A, b=7.121(1) A, c=9.626(3) A, {beta}=115.3(1) Degree-Sign , and Z=2. In the structure, two AlO{sub 4} tetrahedra and two BO{sub 3} planar triangles are connected alternately by corner-sharing to from nearly planar [Al{sub 2}B{sub 2}O{sub 10}] rings, which are further linked via common O1 atom to generate layers in the bc plane. These layers then share the O3 atoms lying on a center of inversion to form a three-dimensional framework with Cs atoms residing in the channels. The IR spectrum confirms the presence of both BO{sub 3} and AlO{sub 4} groups and the UV-vis-IR diffuse reflectance spectrum indicates a band gap of about 4.13(2) eV. - Graphical abstract: A new borate, Cs{sub 2}Al{sub 2}B{sub 2}O{sub 7}, was synthesized. In the structure, BO{sub 3} triangles and AlO{sub 4} tetrahedra are connected to form a three-dimensional framework with Cs{sup +} in the channels. Black-Small-Square Highlights: Black-Right-Pointing-Pointer A new borate Cs{sub 2}Al{sub 2}B{sub 2}O{sub 7} was synthesized and crystals were obtained by flux method. Black-Right-Pointing-Pointer Cs{sub 2}Al{sub 2}B{sub 2}O{sub 7} crystallizes in a new structure type. Black-Right-Pointing-Pointer Two AlO{sub 4} and two BO{sub 3} generate a [Al{sub 2}B{sub 2}O{sub 10}] ring in the structure. Black-Right-Pointing-Pointer Rings are linked to form a three-dimensional framework with Cs{sup +} in the channels. Black-Right-Pointing-Pointer Optical band gap is about 4.13 eV.

• OSTI ID: 21612839
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 12; Other Information: DOI: 10.1016/j.jssc.2011.10.023; PII: S0022-4596(11)00565-2; Copyright (c) 2011 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

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
A CENTERS
ALUMINIUM
BORATES
CESIUM
CESIUM IONS
CRYSTALS
INFRARED SPECTRA
LAYERS
MONOCLINIC LATTICES
OPTICAL PROPERTIES
SOLIDS
SPACE GROUPS
SYNTHESIS
ALKALI METALS
BORON COMPOUNDS
CHARGED PARTICLES
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELEMENTS
IONS
METALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
SPECTRA
SYMMETRY GROUPS
VACANCIES