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Sapphirine and Surinamite: comparative analysis of their Messbauer N-spectra


In Messbauer spectra of natural Sapphirines three doublets of Fe 2+ with distinct electronic structures were determined. The HFS parameters of the Fe 2+ ions in cation structural positions of Sapphirine structure occurred to be close to published for monoclinic Surinamite with the sp. gr. P2/n [J. Barbier - 2002], but have some distinct features. The Fe 3+ ions in spectra of Sapphirines give the spectrum, having low intensity (less 20%), which consists, apparently, of two doublets.