Infrared spectroscopic study of the low-temperature phase behavior of ammonium sulfate
โ Scribed by Fortin, Tara J.
- Book ID
- 119655966
- Publisher
- American Geophysical Union
- Year
- 2002
- Tongue
- English
- Weight
- 402 KB
- Volume
- 107
- Category
- Article
- ISSN
- 0148-0227
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The temperature dependence of the v4-bending band of the ND4+ . -ion in (ND4)2Cr207 shows changes at -170ยฐ, 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
Methanolic solutions containiig perchlorate ions dispIay a resolved, high-frequency O-H stretching band which shifts to lower frequencies on cooling, bat frozen aqueous glasses reveal two such bands, one in the (OH)free re$on (3570 cm-') and one at lower frequencies (ca. 3400 cm-'). The O-H stretch