Mössbauer effect study of phase transition in ice

Differential thermoanalytical studies of frozen ferrous perchlorate solutions

“…The melting temperature of the eutectic mixture was evaluated from the characteristic temperature of peak 2, as -46 _+ 1 ~ in good agreement with the observed disappearance of the M6ss-bauer lines above this temperature, indicating that the Fe(II) ions pass into the liquid phase [2].…”

“…Recent MSssbauer studies of frozen aqueous solutions of Fe(II), particularly of Fe(C10~)2 and FeC12 [1][2][3][4][5], have furnished new information about the structures of these solutions. For the better understanding of some new data, it seemed necessary to study the phase transitions in these systems under non-equilibrium conditions by the use of other methods.…”

High-spin Iron Complexes

“…The contributions to the internal field were estimated (see Table 6.2), as were the excited-state electronic levels [5]. Very unusual behaviour was detected at about 190 K due to a phase transition in the ice [64], and this was later confirmed [65] in a detailed study of the frozen solutions of iron(II) chloride. They have a well-known orthorhombic cubic hightemperature phase transition.…”

Moessbauer spectrometry

“…(Nuclear data taken from A. H. Muir, Jr., K. J. Ando, . M. Coogan, "Mossbauer Effect Data Index (1958-1965," Interscience, New York, 1966) Abbreviations: EFG = electric field gradient…”