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Electron spin echo envelope modulations of SeO3− radicals in (NH4)3H(SeO4)2 crystals

✍ Scribed by J. Goslar; J. Tritt-Goc; W. Hilczer; S.K. Hoffmann; M. Augustyniak

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
75 KB
Volume
45
Category
Article
ISSN
0969-806X

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✦ Synopsis

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 found it to be less sensitive to the structural changes.

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Electron spin echo measurements of spin-
Electron spin echo measurements of spin-lattice and spin-spin relaxation of SeO3− radical in (NH4)3H (SeO4)2 single crystal
✍ W. Hilczer; S.K. Hoffmann; J. Goslar; J. Tritt-Goc; M. Augustyniak 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 91 KB

A brief outline of the relaxation processes leading to the spin echo amplitude decay Will be presented and discussed. Especially the role of the dipole-dipole interaction between electrons and the surrounding nuclei of a matrix will be described as an important mechanism for solids with a low concen

Crystal Structure of (NH4)4H2(SeO4)3 and
Crystal Structure of (NH4)4H2(SeO4)3 and (ND4)4D2(SeO4)3 below 180 K
✍ A. Pawłowski; A. Haznar 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 349 KB

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 ‫؍