ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract Crystals of CsSbF6 belong to the rhombohedral space groupR¯3-C 3i 2 witha=7.904(1)andc=8.261(1) Å,V=446.95 Å3,Z=3,D c=4.11 gcm−3. The antimony atom is surrounded by six fluorine atoms in a nearly perfect octahedral configuration with Sb-F 1.875(9) Å, while 12 fluorine atoms surround the cesium atom with closest contact 3.116 Å. Polarized Raman spectra of single crystals of CsSbF6 have been obtained, and it is shown that these results can be interpreted in terms of a unimolecular rhombohedral structure. The small distortion from an octahedral arrangement for the SbF 6 − group is clearly reflected in the spectra. The Raman results are in better agreement with the space groupR¯3m-D 3d 5 than withR¯3-C 3i 2 , but this conclusion must be regarded with caution since the two features in the vibrational spectra of CsSbF6 which can be used to distinguish between the two structures are weak and ill-defined.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01160697
