ISSN:
0749-1581
Keywords:
atom positions
;
EPR
;
germanium
;
hyperfine
;
quartz
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Germanium 3+ occurs in α-quartz substitutionally for silicon 4+, either as complex anions [GeO4]- or these anions charge-compensated with interstitial alkali cations, i.e. as two primary types of species denoted by [GeO4/M]A, C0, where M = Li, Na. A brief review of the relevant literature is presented. Using the molecular-orbital spin population for the unpaired electron in each center, available from 73Ge and 17O hyperfine data, an evaluation of the likely M+ positions within the quartz structure has been performed. In part, the present calculations were done to test the well known McConnell-Strathdee approach with well defined experimental hyperfine data. A generalized discussion of atom-position determination by EPR, and problems encountered in the process, is included.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260331313
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