Portal de Periódicos da CAPES

Low-temperature infrared studies: I. preliminary communication on the infrared spectrum of ammonium dichromate (NH4)2Cr2O7

1967; Elsevier BV; Volume: 1; Issue: 10 Linguagem: Inglês

10.1016/0009-2614(67)85084-x

1873-4448

C. J. H. Schutte, A.M. Heyns,

X-ray Diffraction in Crystallography

The infrared spectrum of (NH4)2Cr2O7 was investigated from room temperature down to 17°K. Four different phases were observed. At room temperature the infrared spectrum allows the conclusion that the NH+4-ion executes “free” rotation: hindered rotation probably occurs in the lower phases.