Abstract
The double sulfate compound, silver ammonium sulfate (AgNH 4SO 4) has been synthesized and characterized. Powder X-ray diffraction has shown it as a monoclinic system with unit cell dimensions a = 6.49(4), b = 8.47(2), c = 8.71(2) Å and β = 91.913°. A single crystal rotational X-ray photograph also gave the same unit cell dimensions. The infrared spectra exhibit typical NH + 4 and SO 2- 4 vibrational modes. Thermal study using differential scanning calorimetry has shown the existence of a phase transition at 79°C followed by another thermal anomaly at 211°C. The AgNH 4SO 4 crystals also exhibit aging effects, transforming after long storage into Ag 2SO 4. Results are discussed in detail.
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