Quasi‐free rotation of the ammonium ion in crystalline NH 4 ClO 4 | Zendy

Janik J. A. | Zendy; Janik J. M. | Zendy; Mayer J. | Zendy

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Quasi‐free rotation of the ammonium ion in crystalline NH 4 ClO 4

Author(s) -

Janik J. A.,

Janik J. M.,

Mayer J.

Publication year - 1971

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220440144

Subject(s) - ion , ammonium , rotation (mathematics) , chemistry , crystal (programming language) , resolution (logic) , analytical chemistry (journal) , crystallography , mathematics , geometry , organic chemistry , computer science , programming language , chromatography , artificial intelligence

The frequency distribution function g (ω) was measured by IINS in three series of experiments. The resolution Δω/ω in the ω region 15 to 120 cm −1 was about 6% in two of them and in the third one about 15%. The peaks obtained are interpreted as arising from quasi‐free rotation of ammonium ions in the crystal. Their positions and distances agree with those calculated assuming B = 6.30 cm −1 for the rotational constant of NH 4 . Their existence may be treated as a proof of a very low rotational barrier of the NH 4 groups in NH 4 ClO 4 .

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