Phase transitions in ammonium hexafluorometallates (III): A crystallographic and calorimetric study
β Scribed by A. Tressaud; S. Khairoun; P. Hagenmuller; T. Kobayashi; T. Matsuo; H. Suga
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 49 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0022-1139
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The temperature dependence of the v4-bending band of the ND4+ . -ion in (ND4)2Cr207 shows changes at -170Β°, 140\*5. 120\*2 and 80\*5OK. From infrared evidence alone it cannot be decided which of the two possible phase-change sequences, discussed in the text, is correct -there seems to be a correkt