Mossbauer Studies Danalite Analogues Final Word Version.pdf (766.23 kB)
Mössbauer characterisation of synthetic analogues of the helvite minerals Fe4M4[BeSiO4]6X2, (M=Fe, Mn, Zn; X=S, Se)
journal contribution
posted on 2018-07-23, 12:02 authored by Sandie DannSandie Dann, Klaus-Ulrich Neumann, Jose F. MarcoWe report on this paper on the Mossbauer characterisation of the family of synthetic helvite analogues, Fe4M4[BeSiO4]6X2 (M = Fe, Mn, Zn; X = S, Se). The data show iron to be present as high spin Fe(II) in tetrahedral coordination. The room temperature Mossbauer spectra are composed either by singlets or doublets with small quadrupole splitting values suggesting a small valence contribution at that temperature. From the dependence of the quadrupole splitting with temperature the separation Δ between the two eg orbitals has been estimated. The values of Δ range from 46.3 cm− 1 for the material Fe8[BeSiO4]6S2 to 58.2 cm1 for the material Fe4Zn4[BeSiO4]6S2. The lack of long-range magnetic order observed in the Mossbauer spectra was confirmed by neutron diffraction data which suggests that the M4X units are largely magnetically isolated within their cages leading to a frustrated magnet with no long range interaction for the sulfide species.
History
School
- Science
Department
- Chemistry
Published in
Hyperfine InteractionsVolume
239Pages
28 - 45 (17)Citation
DANN, S.E., NEUMANN, K-U. and MARCO, J.F., 2018. Mössbauer characterisation of synthetic analogues of the helvite minerals Fe4M4[BeSiO4]6X2, (M=Fe, Mn, Zn; X=S, Se). Hyperfine Interactions, 239, 28.Publisher
© Springer International PublishingVersion
- AM (Accepted Manuscript)
Publisher statement
This paper was accepted for publication in the journal Hyperfine Interactions and the definitive published version is available at https://doi.org/10.1007/s10751-018-1498-yAcceptance date
2018-07-06Publication date
2018-07-09Copyright date
2018Notes
Part of the following topical collections: Proceedings of the 4th Mediterranean Conference on the Applications of the Mössbauer Effect (MECAME 2018), Zadar, Croatia, 27–31 May 2018ISSN
0304-3843eISSN
1572-9540Publisher version
Language
- en