Gases released during the conversion of NH4Zr2(PO4)(3) to HZr2(PO4)(3) were
identified using an apparatus in which gases released from a sample placed
in a thermogravimetric analyzer were directly introduced to a gas cell of
an IR spectrometer. Such acidic gases as N2O and NO were detected besides t
he basic NH3 gas, and their formation mechanism was discussed.