14N NMR in NH4I and NH4Br |
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| Authors: | R Blinc M Burgar V Rutar |
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| Institution: | J. Stefan Institute, University of Ljubljana, Ljubljana, Yugoslavia |
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| Abstract: | 14N magnetic resonance data show that the α → β transition in NH4I is connected with a discontinuous change in the 14N chemical shift, Δδ = 20.5 ppm, whereas the order-disorder type β(Oh) → γ(D4h) transition is accompanied by a small quadropole splitting of the 14N spectrum. A quadrupole splitting of the 14N line was as well found in the tetragonal “antiferromagnetically” ordered γ-phase of NH4Br, but not in the “ferromagnetically” ordered δ(Td) phase of NH4Cl. |
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