Synthetic Zn-ferrite (ideally ZnFe2O4; mineral name: franklinite) was studied up to 37 GPa, by X-ray powder diffraction at ESRF (Grenoble, France), on the ID9 beamline; high pressure was achieved by means of a DAC. The P-V equation of state of franklinite was investigated using the Birch-Murnaghan function, and the elastic properties thus inferred [K0 = 166.4(± 3.0) GPa K′0 = 9.3(± 0.6) K″0 = -0.22 GPa-1] are compared with earlier determinations for MgA1-spinel and magnetite. The structural behaviour of Zn-ferrite as a function of pressure was studied by Rietveld refinements, and interpreted in the light of a phase transition from spinel to either CaTi2O4- or MnFe2O4-like structure; this transformation occurs above 24 GPa.

Phase transition of synthetic zinc ferrite spinel (ZnFe2O4) at high pressure, from synchrotron X-ray powder diffraction. / D. Levy, A. Pavese, M. Hanfland. - In: PHYSICS AND CHEMISTRY OF MINERALS. - ISSN 0342-1791. - 27:9(2000 Nov), pp. 638-644.

Phase transition of synthetic zinc ferrite spinel (ZnFe2O4) at high pressure, from synchrotron X-ray powder diffraction.

A. Pavese
Secondo
;
2000-11

Abstract

Synthetic Zn-ferrite (ideally ZnFe2O4; mineral name: franklinite) was studied up to 37 GPa, by X-ray powder diffraction at ESRF (Grenoble, France), on the ID9 beamline; high pressure was achieved by means of a DAC. The P-V equation of state of franklinite was investigated using the Birch-Murnaghan function, and the elastic properties thus inferred [K0 = 166.4(± 3.0) GPa K′0 = 9.3(± 0.6) K″0 = -0.22 GPa-1] are compared with earlier determinations for MgA1-spinel and magnetite. The structural behaviour of Zn-ferrite as a function of pressure was studied by Rietveld refinements, and interpreted in the light of a phase transition from spinel to either CaTi2O4- or MnFe2O4-like structure; this transformation occurs above 24 GPa.
Settore GEO/06 - Mineralogia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/179290
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