Mössbauer study of bornite and chemical bonding in Fe-bearing sulphides
| Autor: | Borgheresi M.[1], Di Benedetto F.[1, 2, Romanelli M.[1, Reissner M.[4], Lottermoser W.[5], Gainov R.[6, Khassanov R.[6], Tippelt G.[5], Giaccherini A.[3, Sorace L.[3.8], Montegrossi G.[2, Wagner R.[5], Amthauer G.[5] |
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| Rok vydání: | 2017 |
| Předmět: |
Mossbauer spectroscopy
Chemical bond in sulphides 02 engineering and technology engineering.material 01 natural sciences Ion Paramagnetism Nuclear magnetic resonance Geochemistry and Petrology Magnetic properties 0103 physical sciences Mössbauer spectroscopy Bornite General Materials Science 010306 general physics Valence (chemistry) Mössbauer effect Chemistry Ambientale 021001 nanoscience & nanotechnology Crystallography Chemical bond engineering 0210 nano-technology Néel temperature |
| Zdroj: | Physics and chemistry of minerals 45 (2018): 227–235. doi:10.1007/s00269-017-0911-4 info:cnr-pdr/source/autori:Borgheresi M.[1], Di Benedetto F.[1,2,3], Romanelli M.[1,3], Reissner M.[4], Lottermoser W.[5], Gainov R.[6,7], Khassanov R.[6], Tippelt G.[5], Giaccherini A.[3,8], Sorace L.[3.8], Montegrossi G.[2,3], Wagner R.[5], Amthauer G.[5]/titolo:Mossbauer study of bornite and chemical bonding in Fe-bearing sulphides/doi:10.1007%2Fs00269-017-0911-4/rivista:Physics and chemistry of minerals/anno:2018/pagina_da:227/pagina_a:235/intervallo_pagine:227–235/volume:45 |
| ISSN: | 1432-2021 0342-1791 |
| DOI: | 10.1007/s00269-017-0911-4 |
| Popis: | The Mossbauer spectra of a nearly stoichiometric natural bornite, Cu5FeS4, specimen were reinvestigated between 295 and 4.2 K. There is no difference between the Neel temperature T N as determined by the Mossbauer effect or by the susceptibility measurements (T N = 67.5 K). No additional paramagnetic doublet can be observed in the low-temperature MS spectra. The valence state of Fe is Fe(3−x)+ caused by a partial electron transfer from the Cu+ ions to the Fe3+ ions which increases the shielding of the s-electrons by the d-electron density and by this increases the isomer shift to a value intermediate between tetrahedral high-spin Fe2+ and tetrahedral high-spin Fe3+. |
| Databáze: | OpenAIRE |
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