Abstract
Ionic conductivity of polycrystalline calcite containing varying amounts of PO 3−4 ions was measured in the pressure range of 1–6 GPa and at room temperature. Electrical conductivity increased with pressure corresponding to the phase transition of calcite I to calcite II. The conductivity in calcite III decreased exponentially with pressure. Calculated activation volumes of the conductivity varied with PO 3−4 content in the range of 0.94–5.34 cm3/mol. This variation corresponded to the lattice parameter change of calcite I due to PO 3−4 incorporation and indicated the contribution of CO 2−3 -vacancies associated with PO 3−4 ions to the conductivity.
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Ishikawa, M., Sawaoka, A. & Ichikuni, M. The ionic conductivity in high-pressure polymorphs of calcite. Phys Chem Minerals 8, 247–250 (1982). https://doi.org/10.1007/BF00308245
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DOI: https://doi.org/10.1007/BF00308245