Abstract
The temperature dependence of the EPR spectra of the recently discovered Ag6S3O4 phase in the Ag-O-S system prepared by two methods, the known method of co-precipitation from aqueous solution and a new method depending on the interaction of Ag2S and Ag2SO4 solid reagents, has been investigated. No EPR spectra were observed at room temperature, while at liquid helium temperature a number of EPR spectra have been recorded, which disappeared upon increasing temperature up to liquid nitrogen temperature. The sample obtained by the co-precipitation method revealed an intense, rich EPR spectrum that has been tentatively interpreted assuming the presence of at least two different Ag2+ ion complexes, one monomer resulting in an intense anisotropic, rhombic EPR powder pattern with g1 = 1.93(1), g2 = 2.025(3), g3 = 2.094(5), hyperfine constants A1 = = A2 = 60(5) · 10−4 cm−1,A 3 = 90(5) · 10−4 cm−1 and one dimer EPR pattern presumably involving a pair of Ag2+ ions with internuclear separation of 4.3 Å. However, the presence of larger clusters could not be excluded. On the other hand, the sample obtained by a solid state reaction method has given rise to two rather weak EPR lines centered at geff = 2.105(3) and geff = 4.213(3), respectively.
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Guskos, N., Typek, J., Likodimos, V. et al. EPR study of the Ag6S3O4 compound prepared by two methods. Appl. Magn. Reson. 14, 403–408 (1998). https://doi.org/10.1007/BF03161907
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DOI: https://doi.org/10.1007/BF03161907