uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The high-pressure phase transformation and breakdown of MgFe2O4
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Solid Earth Geology. Berg.
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Earth Sciences, Department of Earth Sciences, Solid Earth Geology. Berg.
2006 (English)In: American Mineralogist, Vol. 91, 560-567 p.Article in journal (Refereed) Published
Abstract [en]

The high-pressure transformation of MgFe2O4 was studied by Mössbauer and Raman spectroscopy and synchrotron X-ray diffraction using the DAC technique and laser annealing at temperatures of 1500-2000 K. The high-pressure phase of MgFe2O4 was observed from in situ Mössbauer spectra

at 17 ± 1 GPa after laser annealing by the appearance of two quadrupole doublets. This indicates a disordered distribution of Mg and Fe in an early stage. The displacive nature of the transformation of the spinel into its high-pressure polymorph was shown at increasing pressure by the redistribution of iron into only one site. After decompression Mössbauer spectroscopy revealed the presence of Fe2O3 in the sample. This was further confirmed by Raman spectroscopy at ambient conditions and by in situ high-pressure XRD, indicating a partial breakdown of the spinel into its constituent oxides MgO and Fe2O3. The XRD pattern of the high-pressure phase of MgFe2O4 can be indexed in agreement with the

CaMn2O4-type structure, with cell parameters a = 2.775(2), b = 9.283(16), and c = 9.446(5)

Place, publisher, year, edition, pages
2006. Vol. 91, 560-567 p.
Keyword [en]
High-pressure studies, magnesioferrite, phase transition, Mössbauer spectroscopy
Identifiers
URN: urn:nbn:se:uu:diva-18899OAI: oai:DiVA.org:uu-18899DiVA: diva2:46671
Available from: 2006-11-23 Created: 2006-11-23 Last updated: 2011-01-11

Open Access in DiVA

No full text

Other links

http://www.minsocam.org/MSA/AmMin/TOC/2006/Apr06.html

Authority records BETA

Winell, SofiaAnnersten, Hans

Search in DiVA

By author/editor
Winell, SofiaAnnersten, Hans
By organisation
Department of Earth SciencesSolid Earth Geology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 355 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf