carbon-bearing Ni(II)-femte (CBNF) was prepared by repeated decomposition of CO2 on Hz-reduced Ni(II> femte. The material was also characterized by Mossbauer spectra, XRD and chemical analysis. A peculiar amorphous surface layer composed of carbon, divalent transition metals and oxide ions (CIO layer) was found to be synthesized on the surface of the CBNF. Deposited carbon on the CBNF was chara...

With an emphasis on assessment of reproducibility and precision of results, the technique of Mossbauer spectroscopy is applied to three groups of materials with increasing structural complexity: simple mineral standards, multivalent and multisite ferruginous micas, and multisite silicate glasses. In order to study the underlying accuracy of Mossbauer measurements of minerals, two mineral standa...

Soluble methane monooxygenase (MMO) isolated from Methylosinus trichosporium OB3b consists of three components: hydroxylase, reductase, and component B. The active-site diiron cluster of the hydroxylase has been studied with Mossbauer, ENDOR, and EPR spectroscopies. Mossbauer spectra of the oxidized cluster show that the two high-spin irons are antiferromagnetically coupled in accord with our p...

Using recoilless Mossbauer spectroscopy methods, we investigate the atomic absorption spectra of the 14.4keV transition in Fe compounds. The natural linewidth of this transition is determined to the correct order of magnitude with χν = .75. Hyperfine energy shifts in iron oxide and iron sulfate are investigated and measured. The ratio of ground and excited state magnetic moment in Fe is found t...