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Modulated crystal structures of phases VII and V in (NH4)3H(SO4)2. Neutron Laue diffraction |
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| Authors: | G J McIntyre L S Smirnov A I Baranov V V Dolbinina M V Frontasyeva S S Pavlov Yu S Pankratova |
| Institution: | 1. Institut Laue-Langevin, BP 156, 38042, Grenoble Cedex 9, France 3. Joint Institute for Nuclear Research, 141980, Dubna, Moscow region, Russia 4. Shubnikov Institute of Crystallography RAS, Moscow, Russia |
| Abstract: | A study of the crystal structure of the phases VII and V of (NH4)3H(SO4)2 by mean of neutron Laue diffraction was carried out at temperatures from 5 to 300 K. It is found that the crystal structures of phases VII and V are incommensurately modulated with different periods, and that the phase transition from phase VII to phase V is of first order. |
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