at Google ScholarTitle data
van Smaalen, Sander ; Dinnebier, Robert E. ; Hanson, Jonathan ; Gollwitzer, Jan ; Büllesfeld, Frank ; Prokofiev, Andrei ; Assmus, Wolf:
High-temperature behavior of vanadyl pyrophosphate (VO)₂P₂O₇.
In: Journal of Solid State Chemistry.
Vol. 178
(2005)
Issue 7
.
- pp. 2225-2230.
ISSN 0022-4596
DOI: https://doi.org/10.1016/j.jssc.2005.04.034
Abstract in another language
(VO)2P2O7(VO)2P2O7 has been studied at high temperatures by in situ X-ray powder diffraction in an inert atmosphere. Lattice parameters indicate an anisotropic thermal expansion up to View the MathML sourceTc=214∘C, followed by an approximately isotropic expansion up to View the MathML source490∘C. It is proposed that TcTc is the temperature of a second-order phase transition between the known room temperature form with space group Pca21Pca21 and a high-temperature form with space group Pcab . Above View the MathML source490∘C a minority phase develops in the sample that was identified as the V3+V3+ containing compound V4(P2O7)3V4(P2O7)3, while the anisotropic expansion along aa suggests that stoichiometric (VO)2P2O7(VO)2P2O7 transforms into (VO)2P2O7+x(VO)2P2O7+x with interstitial oxygen located between the layers. With an onset at View the MathML source706∘C all of the (VO)2P2O7(VO)2P2O7 transforms into VPO4VPO4.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | Thermal expansion |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 530 Physics |
| Date Deposited: | 16 Mar 2016 10:41 |
| Last Modified: | 15 May 2024 11:49 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/31848 |