EPR of SeO3− and CrO43− centers in (NH4)3H(SeO4)2 crystals
✍ Scribed by M. Augustyniak; S.K. Hoffmann; J. Goslar; W. Hilczer
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 133 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0969-806X
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CrO~-radicals are produced by X-rays in (NH4) 3 H(SeO4)2 crystals doped with (NH4) 2 CrO4. The unpaired electron of CrO 3-center is located in the 3d orbital of the Cr 5+ ion. This paramagnetic center was used for monitoring by EPR the high temperature superionic phase transition of the crystal. We
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 ؍