Consistent changes of x-ray peak profiles of Mössbauer area fractions associated with hysteresis of the spin-state transition in [Fe(4.7-(CH 3 ) 2 -phen) 2 (NCS) 2 ]

The nature of spin-state transitions in solid complexes of iron(II) and the interpretation of some associated phenomena

“…The finding confirms the expected difference in lattice vibrations for the two spin-state phases.86 X-ray diffraction produced different peak profiles for the two phases. 55 The relative intensity /»r2//totai derived therefrom conforms closely to the area ratio At^JA^tei derived from Mossbauer spectra (cf. Figure 6).…”

The high-spin (5T2) .dblharw. low-spin (1A1) transition in solid tris(2,2'-bi-2-imidazoline)iron(II) diperchlorate. Hysteresis effects, simultaneous change of spin and lattice characteristics, and order-disorder phenomena of the perchlorate anion

“…The sample thus shows crystallographic hysteresis effects at the transition. A quantitative analysis of the X-ray data within the region of hysteresis as in some previous studies11, 13 was not attempted due to the fact that it was not possible to locate the Bragg reflections corresponding to the same Miller indices in the two phases. For the study of the crystallographic changes associated with the order-disorder transition of the perchlorate anion, X-ray powder diffraction patterns were recorded for a number of temperatures in the vicinity of 7CC1°4.…”

Moessbauer spectroscopy

“…High spin to low spin transitions in FenN6 compounds continue to be the subject of the studies of Konig et al (173,174). In these studies, they discuss the apparent hysteresis in two FenL2(NCS)2 (L = bidentate organic ligand, coordinated to the Fe2+ ion with two N atoms).…”