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Electron Paramagnetic Resonance Study of Copper (II) Ions in Single Crystal of Strontium Formate Dihydrate
Author(s) -
Chand Prem,
Umar M.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221270128
Subject(s) - electron paramagnetic resonance , copper , ion , crystallography , strontium , formate , chemistry , ground state , crystal structure , interstitial defect , covalent bond , condensed matter physics , nuclear magnetic resonance , atomic physics , physics , doping , biochemistry , organic chemistry , catalysis
Strontium formate dihydrate is one of the examples of eight‐coordination forming a distorted antiprism around strontium sites and provides a suitable site to observe the effects of low symmetry on EPR of copper(II) in this lattice. Results of an X‐band EPR study show that copper (II) ions enter the host lattice in two different ways (i) substitutionally and (ii) interstitially, the latter being more favourable. The principal axes of the g ‐ and A ‐tensors do not coincide for the former case in conformity with the low symmetry of the site as determined by X‐ray work. From the obtained experimental data, the ground state wave function for the copper(II) interstitial complex which displays a rhombic symmetry, is constructed. The interstitial complex is of highly covalent nature and the | x 2 – y 2 〉 ground state has an about 5% admixture of |3 z 2 – r 2 〉.