High-pressure Synthesis, Crystal Structure, and Properties of the First Ternary Zirconium Borate β-ZrB2O5

The high-pressure phase β -ZrB represents the first ternary borate in the system Zr-B-O. The compound was synthesized under high-pressure / high-temperature conditions of 7.5 GPa and 1100 °C in a Walker-type multianvil apparatus. The crystal structure was determined on the basis of single crystal X-...

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Published inZeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 63; no. 6; pp. 707 - 712
Main Authors Knyrim, Johanna S., Huppertz, Hubert
Format Journal Article
LanguageEnglish
Published Verlag der Zeitschrift für Naturforschung 01.06.2008
Subjects
Borate
Crystal Structure
Gadolinite
High Pressure
Multianvil
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Summary:The high-pressure phase β -ZrB represents the first ternary borate in the system Zr-B-O. The compound was synthesized under high-pressure / high-temperature conditions of 7.5 GPa and 1100 °C in a Walker-type multianvil apparatus. The crystal structure was determined on the basis of single crystal X-ray diffraction data, collected at room temperature. The monoclinic zirconium borate crystallizes in the space group P2 /c with the lattice parameters a = 439.04(9), b = 691.2(2), c = 896.8(2) pm, and β = 90.96(3)°. The structure is isotypic to the high-pressure phase β -HfB , which is built up from layers of exclusively corner-sharing BO tetrahedra. Between these layers, the cations are coordinated square-antiprismatically by eight oxygen atoms.
ISSN:0932-0776
1865-7117
DOI:10.1515/znb-2008-0617