Abstract:ChemInform Abstract NH4I•NH3 (I), prepared by exposure of NH4I to gaseous NH3 of 350-450 torr, crystallizes at 298 K in the cubic space group Pm3m with Z=1. The powder and single crystal XRD data confirm the presence of the title cation in (I). The N-N distance is determined to be 269 pm indicating a strong interaction between NH4+ and NH3. During cooling of (I), transitions to three other modifications with increasing degree of structural order are observed. (I) is tetragonal in the range 230-203 K (P4/mmm, Z… Show more
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