Ferrites of K and Ba close in composition to the known synthetic compounds and were found in a thin vein, filled with magnesioferrite and khesinite, in pyrometamorphic flamite–gehlenite hornfels of the Hatrurim Complex, Palestinian Autonomy. Both ferrites are characterized by a modular structure composed of 5-layered spinel (S) blocks interstratified with R-blocks. The R-modules of K-ferrite are of the β-alumina type whereas those in Ba-ferrite are of the magnetoplumbite type. Rare grains of K-Ba-ferrite of intermediate composition with the empirical crystal chemical formula (EPMA): , were also discovered. The structure of the natural mixed potassium-barium ferrite was investigated by single-crystal X-ray diffraction. The hexagonal space-group symmetry (, Z = 2) with a = 5.9137(2) and c = 33.1450(15) Å is different to that (P63/mmc) of the end-members and yields alternate stacking of β-alumina type KMg2Fe15O25 and magnetoplumbite type BaMg2Fe16O27 “supermodules”, each extending ½ of the unit cell along c. Raman spectroscopic study confirms the mixed character of K-Ba-ferrite structure. K-Ba-ferrite formed at non-equilibrium conditions and may be interpreted as an example of a nano-dissipative structure.
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Research Article|
May 01, 2018
First natural hexaferrite with mixed β‴-ferrite (β-alumina) and magnetoplumbite structure from Jabel Harmun, Palestinian Autonomy
Evgeny V. Galuskin;
1
Faculty of Earth Sciences, Department of Geochemistry, Mineralogy and Petrography, University of Silesia
, Będzińska60, 41-200Sosnowiec, Poland
Corresponding author, e-mail: evgeny.galuskin@us.edu.pl
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Irina O. Galuskina;
Irina O. Galuskina
1
Faculty of Earth Sciences, Department of Geochemistry, Mineralogy and Petrography, University of Silesia
, Będzińska60, 41-200Sosnowiec, Poland
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Remo Widmer;
Remo Widmer
2
Mineralogical Crystallography, Institute of Geological Sciences, University of Bern
, Baltzerstr. 1+3, 3012Bern, Switzerland
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Thomas Armbruster
Thomas Armbruster
2
Mineralogical Crystallography, Institute of Geological Sciences, University of Bern
, Baltzerstr. 1+3, 3012Bern, Switzerland
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1
Faculty of Earth Sciences, Department of Geochemistry, Mineralogy and Petrography, University of Silesia
, Będzińska60, 41-200Sosnowiec, Poland
Irina O. Galuskina
1
Faculty of Earth Sciences, Department of Geochemistry, Mineralogy and Petrography, University of Silesia
, Będzińska60, 41-200Sosnowiec, Poland
Remo Widmer
2
Mineralogical Crystallography, Institute of Geological Sciences, University of Bern
, Baltzerstr. 1+3, 3012Bern, Switzerland
Thomas Armbruster
2
Mineralogical Crystallography, Institute of Geological Sciences, University of Bern
, Baltzerstr. 1+3, 3012Bern, Switzerland
Corresponding author, e-mail: evgeny.galuskin@us.edu.pl
Publisher: Deutsche Mineralogische Gesellschaft, Sociedad Española de Mineralogia, Societá Italiana di Mineralogia e Petrologia, Société Francaise de Minéralogie
Received:
06 Jun 2017
Revision Received:
27 Jul 2017
Accepted:
31 Jul 2017
First Online:
26 Apr 2018
Online ISSN: 1617-4011
Print ISSN: 0935-1221
© 2018 E. Schweizerbart'sche Verlagsbuchhandlung, D-70176 Stuttgart
European Journal of Mineralogy (2018) 30 (3): 559–567.
Article history
Received:
06 Jun 2017
Revision Received:
27 Jul 2017
Accepted:
31 Jul 2017
First Online:
26 Apr 2018
Citation
Evgeny V. Galuskin, Irina O. Galuskina, Remo Widmer, Thomas Armbruster; First natural hexaferrite with mixed β‴-ferrite (β-alumina) and magnetoplumbite structure from Jabel Harmun, Palestinian Autonomy. European Journal of Mineralogy 2018;; 30 (3): 559–567. doi: https://doi.org/10.1127/ejm/2018/0030-2697
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Index Terms/Descriptors
- Asia
- cell dimensions
- chemical composition
- crystal structure
- electron probe data
- formula
- magnesioferrite
- metamorphic rocks
- Middle East
- oxides
- Palestine
- Raman spectra
- space groups
- spectra
- symmetry
- unit cell
- veins
- West Bank
- X-ray diffraction data
- magnetoplumbite
- Hatrurim Formation
- hexaferrite
- pyrometamorphic rocks
- Jabel Harmun
- beta-ferrite
Latitude & Longitude
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