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Infrared reflectivity study of the phase transitions in sodium ammonium sulfate dihydrate

โœ Scribed by Ribeiro, J L; Vieira, L G; Gomes, I Tarroso; Moreira, J Agostinho; Almeida, A; Chaves, M R; Santos, M L; Alferes, P P

Book ID
121812231
Publisher
Institute of Physics
Year
2006
Tongue
English
Weight
961 KB
Volume
18
Category
Article
ISSN
0953-8984

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Low-temperature infrared studies: III. T
Low-temperature infrared studies: III. The phase transitions in ammonium-d4 dichromate
โœ C.J.H. Schutte; A.M. Heyns ๐Ÿ“‚ Article ๐Ÿ“… 1968 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 174 KB

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