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2005
Tellurium
I 0053
08- 016
Structural, Vibrational and Dielectric Properties of the New Mixed Solution
K0.84(NH4)1.16SO4иTe(OH)6. ? Colorless single crystals of the title compound are
obtained from an aqueous solution of K2SO4, (NH4)2SO 4, and Te(OH) 6 at room temperature. K0.84(NH4)1.16 SO4иTe(OH) 6 crystallizes in the monoclinic space group P21/C with
Z = 4. The structure consists of isolated TeO6 octahedra, SO4 tetrahedra, and K+ and
N H+4 cation, which are held together by O?HиииO and N?HиииO hydrogen bonds.
DSC, Raman spectroscopy, and XRD results show the existence of three phase transitions at 425, 470, and 480 K. ? (KTARI, L.; DAMMAK*, M.; HADRICH, A.;
COUSSON, A.; NIERLICH, M.; ROMAIN, F.; MHIRI, T.; Solid State Sci. 6 (2004)
12, 1393-1401; Lab. Etat Solide, Univ. Sfax, 3018 Sfax, Tunisia; Eng.) ? Schramke
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