TY  - JOUR
A1  - Send, Sebastian
A1  - von Kozierowski, Marc
A1  - Panzner, Tobias
A1  - Gorfman, Semen
A1  - Nurdan, Kivanc
A1  - Walenta, Albert H.
A1  - Pietsch, Ullrich
A1  - Leitenberger, Wolfram
A1  - Hartmann, Robert
A1  - Strüder, Lothar
T1  - Energy-dispersive Laue diffraction by means of a frame-store pnCCD
Y1  - 2009
UR  - http://journals.iucr.org/j/journalhomepage.html
U6  - https://doi.org/10.1107/S0021889809039867
SN  - 0021-8898
ER  - 
TY  - JOUR
A1  - Gorfman, Semen
A1  - Tsirelson, Vladimir
A1  - Pucher, Andreas
A1  - Morgenroth, Wolfgang
A1  - Pietsch, Ullrich
T1  - X-ray diffraction by a crystal in a permanent external electric field : electric-field-induced structural response in alpha-GaPO4
N2  - For the first time, site-selective distortion has been investigated for two different structural units in the ternary compound alpha-GaPO4 under the influence of a permanent external electric field. Based on 54 measured reflection intensities, the electric-field-induced distortion of PO4 and GaO4 tetrahedra in alpha-GaPO4 crystals is evaluated using a model of pseudoatomic displacements introduced recently [Gorfman, Tsirelson & Pietsch (2005). Acta Cryst. A61, 387- 396]. A stronger variation of the P-O bond lengths in the PO4 tetrahedron was found compared to the bonds in the GaO4 tetrahedron. The different distortions of the tetrahedra owing to the electric field were analysed in terms of the valence charge density of alpha-GaPO4 and its topological characteristics. The larger charge of the P pseudoatom compared to the Ga atom was recognized as the main reason for the higher sensitivity of the PO4 tetrahedron to a permanent external electric field
Y1  - 2006
UR  - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1600-5724
U6  - https://doi.org/10.1107/S0108767305036111
SN  - 0108-7673
ER  -