Reaction of niobium pentoxide with ammonium hydrodifluoride

Тихомирова, Е. Л.; Макаров, Д. В.; Калинников, В. Т.

doi:10.1134/s0036023608070024

Cited by 7 publications

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“…Ammonium hydrogen fluoride NH 4 HF 2 is readily soluble in water and provides an acidic solution. It was reported that the reaction between Nb 2 O 5 and NH 4 HF 2 occurs at 373–403 K, and the product (NH 4 ) 3 NbOF 6 could be obtained . The reaction can be written as follows:

N b_{2} O_{5} + N H_{4} H F_{2} \to {(N H_{4})}_{3} NbO F_{6} + H_{2} O

…”

Section: Resultsmentioning

confidence: 99%

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Hydrothermal Syntheses and Structural Phase Transitions of AgNbO₃

et al. 2012

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The phase‐pure AgNbO3 has been prepared through the hydrothermal reactions of NH4HF2, Ag2O, and Nb2O5. The room‐temperature powder X‐ray diffraction analysis reveals that it crystallizes in orthorhombic perovskite lattice with a space group of Pmc21 and cell parameters a = 15.6999(9), b = 5.5521(1), and c = 5.5830(1) Å. The temperatures, pH values, and times play crucial roles in obtaining phase‐pure silver niobate. The structural phase transitions were observed at 813 K from cubic to tetrahedral phase and to final orthorhombic phase at 718 K, confirmed by TGA‐DTA.

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N b_{2} O_{5} + N H_{4} H F_{2} \to {(N H_{4})}_{3} NbO F_{6} + H_{2} O

…”

Section: Resultsmentioning

confidence: 99%

“…It was reported that the reaction between Nb 2 O 5 and NH 4 HF 2 occurs at 373-403 K, and the product (NH 4 ) 3 NbOF 6 could be obtained. 22 The reaction can be written as follows:…”

Section: Resultsmentioning

confidence: 99%