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 K0 ′ = 9.3(±0.6) K0 ″ = −0.22 GPa−1] are compared with earlier determinations for MgAl-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.
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Received: 15 March 1999 / Accepted: 22 April 2000
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Levy, D., Pavese, A. & Hanfland, M. Phase transition of synthetic zinc ferrite spinel (ZnFe2O4) at high pressure, from synchrotron X-ray powder diffraction. Phys Chem Min 27, 638–644 (2000). https://doi.org/10.1007/s002690000117
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DOI: https://doi.org/10.1007/s002690000117