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Wolf-Dieter Stein, Alain Cousson, Petra Becker, Ladislav Bohatý, Markus Braden

Temperature-dependent X-ray and neutron diffraction study of BiB₃O₆

Keywords: Bismuth triborate, Non-linear optics, Neutron diffraction, X-ray diffraction, Single crystal structure analysis

The structure of bismuth triborate has been analyzed by the combination of neutron and X-ray diffraction on powder and on single-crystalline samples. Bismuth triborate exhibits a distinct anisotropic thermal expansion with the coefficient along a being negative over the wide temperature range studied, 20 to 800 K. The remarkable crystal structure of bismuth triborate with a netlike linkage of rigid borate units [BO₃] and [BO₄], is found to generate the uncommon thermal expansion behavior. Our investigations gave no evidence for a structural phase transition in bismuth triborate between 3.5 and 999 K at ambient pressure.

Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0044-2968
Volume: 222, 12/2007
Pages: 680 - 689

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