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Loose, A.; Wozniak, K.; Dominiak, P.; Smirnov, L.S.; Natkaniec, I.; Frontas'eva, M.V.; Pomyakushina, E.V.; Baranov, A.I.; Dolbinina, V.V
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)2006
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation)2006
AbstractAbstract
[en] The study of [Rbx(NH4)1-x]3H(SO4)2 mixed crystals by X-ray single-crystal diffraction is known up to now only for x=0.57 at the temperatures 293 and 180 K. The crystal structures at these temperatures as was determined [1] belong to monoclinic phase II (C2/c sp. gr., Z=4). In accordance with this work, ammonium ions should be considered as deformed tetrahedra. Monoclinic phase II on the x-T phase diagram of [Rbx(NH4)1-x]3H(SO4)2 mixed crystals, which has earlier been determined by the dielectric spectroscopy, is stabilized below room temperature if Rb concentration exceeds 9%. The presented results of X-ray and neutron single-crystal diffraction of the [Rb0.11(NH4)0.89]3H(SO4)2 mixed crystal at T= 300 K show that ammonium ions could be considered as regular tetrahedra
Source
2006; 17 p; Also available online: http://www1.jinr.ru/Preprints/2006/059(E14-2006-59).pdf; 9 refs., 11 figs., 6 tabs. Submitted to the journal, Crystallography Reports
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