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Crystal structures of α-quartz homeotypes boron phosphate and boron arsenate: structure-property relationships
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Julien Haines
Published/Copyright:
September 25, 2009
Abstract
The structures of single crystals of the α-quartz homeotypes boron phosphate and boron arsenate prepared under high-pressure, high-temperature conditions in a belt-type apparatus were determined by X-ray diffraction. Both structures are more distorted with respect to the β-quartz structure type than α-quartz itself with average tetrahedral tilt angles δ of 19.7° and 24.6° for BPO4 and BAsO4, respectively. The structure of BAsO4 is one of the most highly distorted found among α-quartz homeotypes. It is shown that for the known α-quartz homeotypes, the density, which can be related to the frequency constant for piezoelectric resonators, scales with the intertetrahedral bridging angle θ.
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Published Online: 2009-9-25
Published in Print: 2004-1-1
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- Editorial
- Quantitative comparisons of structures
- TexPat – a program for quantitative analysis of oblique texture electron diffraction patterns
- The system Cu3AsS4–Cu3SbS4 and investigations on normal tetrahedral structures
- Determinations of crystallographic space group and atomic arrangements in oxide-ion-conducting Nd9.33(SiO4)6O2
- Crystal structures of α-quartz homeotypes boron phosphate and boron arsenate: structure-property relationships
- Three polymorphic forms of dipotassium O-phospho-L-serinate hydrates
- Comparative neutron and X-ray study of [PPN][HIr4(CO)9(μ-Ph2PCH2PPh2)]
- Books Received
