Summary
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1.
We have determined the solubility of TiO2 in hydrofluoric acid solutions containing between 0 and 39.6% HF and we have proved the formation of titanium oxyfluoride of compositions TiOF2 · H2O in the form of a solid phase.
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2.
Using methods of conductometry, cryoscopy, and the measurement of electrical conductivity we have demonstrated the existence in the solution of fluorotitanic acids H[TiF4(OH)H2O], H[TiF5 · H2O], and H2[TiF6].
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Buslaev, Y.A., Bochkareva, V.A. & Nikolaev, N.S. The reaction of titanium dioxide with hydrofluoric acid. Russ Chem Bull 11, 361–364 (1962). https://doi.org/10.1007/BF00909521
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DOI: https://doi.org/10.1007/BF00909521