Critical phenomena at the 300 K structural phase transitions in Al(urea)6(ClO4)3 and Ga(urea)6(ClO4)3
โ Scribed by J.H.M. Mooy; J. Bolhuis
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 287 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0038-1098
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Electron spin resonance of aluminum hesaurcn perchlorate doped with Cr(urca),&C104)~ has been investigated in the temperature range 77 io 360ยฐK. At 77ยฐK the vaiucs of the spin hnmiitonian paramctcrs of the chromium complex are: IDI = (168 2 10) X lo4 cm -I, IEI = (t62k 10) X lo4 cm-',gli = 1.977 2 O
Crystals of Al(urea)6(C10~)3 are rhombohedral at room temperature with space group R% 2nd hexagonal ceIL constants c = 18.087 and c = 13.980 A. The crystal structure ai room temperature has been determined. It is isomorphous with that ofTi(ureaj6(C10q)a and eshibits the same sort of disorder for the