Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
87 (1987), S. 68-72
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
A 19F NMR multipulse measurement of the chemical shift in a single crystal of cubic RbCaF3 gave −47.0±3 ppm as the isotropic value with respect to C6F6, and 128.7±6 ppm as the anisotropy. The shielding is accounted for by the usual diamagnetic and paramagnetic ionic overlap and covalent terms. As a result, the Ca++ −F− bond is estimated to be 98% ionic. No significant spectral changes were found when the crystal was cooled below the cubic to tetragonal phase transition temperature. Reasons for this are given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.453565
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