X–ray Single Crystal Structure and Raman Spectrum of Ammonium Hexafluoroarsenate |
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| Authors: | E Goreshnik Z Mazej Dr |
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| Institution: | 1. Ljubljana / Slovenia, Jo?ef Stefan Institute, Department of Inorganic Chemistry and Technology;2. Ljubljana / Slovenia, Jo?ef Stefan Institute, Department of Inorganic Chemistry and TechnologyJo?ef Stefan Institute, Jamova 39, SI‐1000 Ljubljana, Slovenia |
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| Abstract: | The structure of ammonium hexafluoroarsenate, NH4AsF6, has been determined by X‐ray diffraction using a single crystal grown from saturated solution in anhydrous HF. NH4AsF6 crystallizes rhombohedral with the KOsF6 structure type, with a = 7.459(3) Å, c = 7.543(3) Å (at 200 K), Z = 3, space group  (No. 148). No phase transition was observed in the 100 K–296 K temperature range. The structure is dominated by regular AsF6 octahedra and disordered NH4+ cations. Raman spectrum of a single crystal of NH4AsF6 shows the bands at 372 cm?1, 572 cm?1, 687 cm?1 (AsF6?) and at 3240 cm?1 and 3360 cm?1 (NH4+). |
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| Keywords: | Ammonium Fluorides Crystal structure Raman spectroscopy |
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