三碘化铵(Ammonium triiodide)是三碘阴离子和铵离子形成的盐,化学式为NH4I3。它是暗蓝色的片状晶体,仅在潮湿空气中潮解。[1]
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它可由碘化铵和碘在水溶液中反应得到[2]。
三碘化铵是正交晶系的晶体,空间群Pnma,晶胞参数a=10.854, b=6.620, c=9.595。[3]
Cheesman, G. H.; Finney, A. J. T. Refinement of the structure of ammonium triiodide, NH4I3. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 1970, 26 (7): 904–906. ISSN 0567-7408. doi:10.1107/S0567740870003357.
Tebbe, K. F.; Freckmann, B.; Hoerner, M.; Hiller, W.; Straehle, J. Polyhalides. 7. Confirmation of the crystal structure of ammonium triiodides, NH4I3(德文). Acta Crystallographica, Section C: Crystal Structure Communications, 1985. 41 (5): 660-663. ISSN: 0108-2701