The structure of (NH 4 ) 4 H 2 (SeO 4 ) 3 and (ND 4 ) 4 D 2 (SeO 4 ) 3 superionic crystals below 180 K determined by X-ray singlecrystal analysis is presented. The compounds have the following crystal data: (NH 4 ) 4 H 2 (SeO 4 ) 3 (T ؍ 140 K), triclinic, space group P-1, a ؍ 7.647(2) A s , b ؍
Raman and infrared study of structural phase transitions in (NH4)3H(SeO4)2 and (ND4)3D(SeO4)2
✍ Scribed by G. Raimbault; F. Romain; A. Lautié
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 700 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0377-0486
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Differential scanning calorimetry (DSC) and X-ray diffraction measurements have been performed on pentasodium trihydrogen tetraselenate dihydrate Na 5 H 3 (SeO 4 ) 4 •2H 2 O and deuterated Na 5 D 3 (SeO 4 ) 4 •2D 2 O crystals. Any distinct anomaly around 428 K in the DSC curves for both crystals is
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