Synthesis, crystal structure, infrared and Raman spectra of Sr5(As2O7)2(AsO3OH)
- Author(s)
- T Mihajlovic, Eugen Libowitzky, Herta Silvia Effenberger
- Abstract
The new compound Sr5(As2O7) 2(AsO3OH) was synthesized under hydrothermal conditions. It represents a previously unknown structure type and belongs to a group of a few compounds in the system SrO-As2O5-H2O; (As2O7)4- besides (AsO3OH) 2- groups have not been described yet. The crystal structure of Sr5(As2O7)2(AsO3OH) was determined by single-crystal X-ray diffraction (space group P21/n, a=7.146(1), b=7.142(1), c2.750(1)A°, ß“.67(3)°, V68.0(5)A°3, Z=4). One of the five symmetrically unique Sr atoms is in a trigonal antiprismatic (Inorg. Chem. 35 (1996) 4708) - coordination, whereas the other Sr atoms adopt the commonly observed ("Collect" data collection software, Delft, The Netherlands, 1999; Methods Enzymol. 276 (1997) 307) - coordination. The position of the hydrogen atom was located in a difference Fourier map and subsequently refined with an isotropic displacement parameter. Worth mentioning is the very short hydrogen bond length O h-H?O(1) of 2.494(4) A°; it belongs to the shortest known examples where the donor and acceptor atoms are crystallographically different. This hydrogen bond was confirmed by IR spectroscopy. In addition, Raman spectra were collected in order to study the arsenate groups. Œ 2004 Elsevier Inc. All rights reserved.
- Organisation(s)
- Department of Mineralogy and Crystallography
- Journal
- Journal of Solid State Chemistry
- Volume
- 177
- Pages
- 3963-3970
- No. of pages
- 8
- ISSN
- 0022-4596
- DOI
- https://doi.org/10.1016/j.jssc.2004.06.036
- Publication date
- 2004
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 1051 Geology, Mineralogy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/09892a45-7d28-4da8-86a1-b6f8bf8c362c