Conclusions
The compound Sc3TaO7 synthesized at 1300°C has a monoclinic modification which is stable in vacuum in the 25–1700°C range. We detected a phase inversion of the monoclinic modification into the tetragonal at 1800°C, accompanied by a change in the chemical composition with respect to oxygen. We determined the temperature coefficients of linear expansion of the monoclinic modification of Sc3TaO7 in the 25–1700°C range, and detected a marked anisotropy of temperature expansion in the crystal lattice.
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The author wishes to thank O. N. Vasil'eva for assistance with the experiments.
Translated from Ogneupory, No. 7/8, pp. 14–16, July–August, 1992.
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Solov'eva, A.E. Structural features of Sc3TaO7 . Refractories 33, 372–375 (1992). https://doi.org/10.1007/BF01283299
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DOI: https://doi.org/10.1007/BF01283299