Structural and Vibrational Study of (NH4)3H(SO4)1.42(SeO4)0.58 Mixed Crystals
Identifieur interne : 001A87 ( Main/Exploration ); précédent : 001A86; suivant : 001A88Structural and Vibrational Study of (NH4)3H(SO4)1.42(SeO4)0.58 Mixed Crystals
Auteurs : M. Gargouri ; R. Ben Hassen [Tunisie] ; T. Mhiri [Tunisie] ; A. Daoud [Tunisie]Source :
- physica status solidi (b) [ 0370-1972 ] ; 1998-04.
English descriptors
- Teeft :
Abstract
At room temperature (T = 293(2) K) (NH4)3H(SO4)1.42(SeO4)0.58 (NHSSe) Mm = 274.34 g possesses a monoclinic structure with space group Cc. The unit cell parameters are: a = 15.564(6) Å, b = 5.9180(6) Å, c = 10.275(2) Å, β = 102.09(2)°, V = 925.4(4) Åü3, Z = 4, Dx = 1.97 g/cm3. The structure was determined with R = 0.0529 and wR2 = 0.1373 for 826 observed reflections. The Raman and infrared spectra at room temperature were investigated in the frequency ranges 10 to 1300 cm—1and 400 to 1600 cm—1, respectively. The assignment of most of the bands is given. We note for this compound two kinds of disorder to be expected: a statistical or dynamic disorder of the acidic proton O–H–O hydrogen bond and another one which is connected with a reorientational motion of NH+4 ions.
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DOI: 10.1002/(SICI)1521-3951(199804)206:2<535::AID-PSSB535>3.0.CO;2-N
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="de">At room temperature (T = 293(2) K) (NH4)3H(SO4)1.42(SeO4)0.58 (NHSSe) Mm = 274.34 g possesses a monoclinic structure with space group Cc. The unit cell parameters are: a = 15.564(6) Å, b = 5.9180(6) Å, c = 10.275(2) Å, β = 102.09(2)°, V = 925.4(4) Åü3, Z = 4, Dx = 1.97 g/cm3. The structure was determined with R = 0.0529 and wR2 = 0.1373 for 826 observed reflections. The Raman and infrared spectra at room temperature were investigated in the frequency ranges 10 to 1300 cm—1and 400 to 1600 cm—1, respectively. The assignment of most of the bands is given. We note for this compound two kinds of disorder to be expected: a statistical or dynamic disorder of the acidic proton O–H–O hydrogen bond and another one which is connected with a reorientational motion of NH+4 ions.</div>
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