Time-differential perturbed angular correlations investigation of the (NH4)2ZrF6 thermal decomposition
- 1 February 1985
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 82 (3) , 1271-1274
- https://doi.org/10.1063/1.448448
Abstract
Via the TDPAC technique and complementary x‐ray diffraction analysis, the thermal decomposition of (NH4)2ZrF6 has been observed to occur in the range 400–800 K according to the thermolysis scheme (NH4)2ZrF6→485 KNH4ZrF5→560 KNH4Zr2F9 →620 KZrF4→760 KZrO2. Assuming that the first transformation takes place through the simple chemical reaction (NH4)2ZrF6→NH4ZrF5+NH4F, the corresponding activation energy has been determined to be Ea=(82±6) kJ/mol. The hyperfine parameters of the NH4Zr2F9 decomposition product have been determined between 14 and 560 K. A complete analogy with the isomorphous compound NH4Hf2F9 was observed.Keywords
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