Reaction of Niobium Pentoxide
with Ammonium Hydrodifluoride

E. L. Tikhomirova, D. V. Makarov, and V. T. Kalinnikov

Tananaev Institute of the Chemistry and Technology of Rare Elements and Minerals, Kola Research Center, Russian Academy
of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184200 Russia

Received March 1, 2007

Abstract—The reaction between Nb₂O₅ and NH₄HF₂ is studied by thermogravimetric analysis, IR spectros-
copy, and crystal-optical analysis. Intermediates and their formation temperatures are determined.

DOI: 10.1134/S0036023608070024

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