High-pressure properties of TiP2O7, ZrP2O7 and ZrV2O7
(2001) In Journal of Applied Crystallography 34(1). p.7-12- Abstract
High-pressure synchrotron X-ray powder diffraction studies of TiP2O7, ZrP2O7 and ZrV2O7 have been performed. The ZrV2O7 structure undergoes a reversible transition at 1.38-1.58 GPa from cubic α- to pseudo-tetragonal β-ZrV2O7 that displays an orthorhombic 2 × 3 × 3 supercell. At pressures above 4 GPa, ZrV2O7 becomes irreversibly X-ray amorphous. No such transformations are observed for TiP2O7 and ZrP2O7, which compress smoothly up to the highest investigated pressures (40.3 and 20.5 GPa, respectively). These differences in high-pressure properties are discussed in... (More)
High-pressure synchrotron X-ray powder diffraction studies of TiP2O7, ZrP2O7 and ZrV2O7 have been performed. The ZrV2O7 structure undergoes a reversible transition at 1.38-1.58 GPa from cubic α- to pseudo-tetragonal β-ZrV2O7 that displays an orthorhombic 2 × 3 × 3 supercell. At pressures above 4 GPa, ZrV2O7 becomes irreversibly X-ray amorphous. No such transformations are observed for TiP2O7 and ZrP2O7, which compress smoothly up to the highest investigated pressures (40.3 and 20.5 GPa, respectively). These differences in high-pressure properties are discussed in terms of the negative thermal expansion of ZrV2O7. The bulk moduli at ambient pressure (Bo) for TiP2O7, ZrP2O7, α-ZrV2O7 and β-ZrV2O7 were estimated to be 42 (3), 39 (1), 17.0 (7) and 20.8 (10) GPa, respectively.
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- author
- Carlson, Stefan LU and Andersen, Anne Marie Krogh
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- in
- Journal of Applied Crystallography
- volume
- 34
- issue
- 1
- pages
- 6 pages
- publisher
- International Union of Crystallography
- external identifiers
-
- scopus:14944354534
- ISSN
- 0021-8898
- DOI
- 10.1107/S0021889800013856
- language
- English
- LU publication?
- yes
- id
- 3b1fdcc2-44ba-43f2-bff0-dbee12a73204
- date added to LUP
- 2016-05-04 11:49:43
- date last changed
- 2022-02-06 20:28:44
@article{3b1fdcc2-44ba-43f2-bff0-dbee12a73204, abstract = {{<p>High-pressure synchrotron X-ray powder diffraction studies of TiP<sub>2</sub>O<sub>7</sub>, ZrP<sub>2</sub>O<sub>7</sub> and ZrV<sub>2</sub>O<sub>7</sub> have been performed. The ZrV<sub>2</sub>O<sub>7</sub> structure undergoes a reversible transition at 1.38-1.58 GPa from cubic α- to pseudo-tetragonal β-ZrV<sub>2</sub>O<sub>7</sub> that displays an orthorhombic 2 × 3 × 3 supercell. At pressures above 4 GPa, ZrV<sub>2</sub>O<sub>7</sub> becomes irreversibly X-ray amorphous. No such transformations are observed for TiP<sub>2</sub>O<sub>7</sub> and ZrP<sub>2</sub>O<sub>7</sub>, which compress smoothly up to the highest investigated pressures (40.3 and 20.5 GPa, respectively). These differences in high-pressure properties are discussed in terms of the negative thermal expansion of ZrV<sub>2</sub>O<sub>7</sub>. The bulk moduli at ambient pressure (Bo) for TiP<sub>2</sub>O<sub>7</sub>, ZrP<sub>2</sub>O<sub>7</sub>, α-ZrV<sub>2</sub>O<sub>7</sub> and β-ZrV<sub>2</sub>O<sub>7</sub> were estimated to be 42 (3), 39 (1), 17.0 (7) and 20.8 (10) GPa, respectively.</p>}}, author = {{Carlson, Stefan and Andersen, Anne Marie Krogh}}, issn = {{0021-8898}}, language = {{eng}}, number = {{1}}, pages = {{7--12}}, publisher = {{International Union of Crystallography}}, series = {{Journal of Applied Crystallography}}, title = {{High-pressure properties of TiP2O7, ZrP2O7 and ZrV2O7}}, url = {{http://dx.doi.org/10.1107/S0021889800013856}}, doi = {{10.1107/S0021889800013856}}, volume = {{34}}, year = {{2001}}, }