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The Ferroelectric Phase Transition and Modulated Valence Electrons in the Incommensurate Phase of Ammonium Tetrafluoroberyllate

Title data

Palatinus, Lukas ; van Smaalen, Sander:
The Ferroelectric Phase Transition and Modulated Valence Electrons in the Incommensurate Phase of Ammonium Tetrafluoroberyllate.
In: Ferroelectrics. Vol. 305 (2004) Issue 1 . - pp. 49-52.
ISSN 1563-5112
DOI: https://doi.org/10.1080/00150190490462388

Official URL: Volltext

Abstract in another language

The incommensurate structure of (NH 4 ) 2 BeF 4 is determined from single-crystal x-ray diffraction at T = 175 K. Comparison of this structure with the low-temperature structure shows the ferroelectric phase transition to correspond to the simultaneous development of local and global polarisations. The modulations of the electrons in the chemical bonds are made visible by the Maximum Entropy Method with the modulated structure as superspace prior.

Further data

Item Type: Article in a journal
Refereed: Yes
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: 17 Mar 2016 07:46
Last Modified: 17 Mar 2016 07:46
URI: https://eref.uni-bayreuth.de/id/eprint/31877