Mo¨ssbauer studies of thiospinels. III. The system FeCr2S4 -FeIn2S4

Mössbauer investigation of Fe0.5In1.5S3

“…A small amount (mean relative intensity over all measurements for this subspectrum 0.025) of an impurity phase, although not detectable in the X-ray investigations, The observed values of eQV zz /2 and CS ( Figure 2) are in line with this allocation and agree well with those reported in literature [6][7][8][9]. From neutron and X-ray investigations a ratio of 0.055:1 is found for the occupation of Fe on A:B sites [11], which is in full agreement with the ratio determined in the present analysis of the Mössbauer spectra neglecting a possible difference in the f-factor as observed for these two sites in isostructural Fe 3 O 4 [10].…”

“…Since the distances to the tetrahedrally coordinated cations are only approximately 5% larger, the 15 possible different surroundings of the third neighbour shell should in addition be taken into account. On the other hand, it was observed[6][7][8][9] that the various possible environments of Fe located on the B-sites, influence eQV zz /2 and CS only to a less extent. The main contribution to the quadrupole splitting of these sites results from a trigonal distortion of the sulfur octahedra, which for space reasons are pushed somewhat away along the four [111] directions.…”

“…From magnetic susceptibility measurements a spin-only value for divalent Fe was obtained, which is also confirmed by the isomer shift data [6][7][8][9]. The existence of a quadrupole splitting (eQV zz /2 = 3.23 mm/s at room temperature) in an octahedral environment was taken as an indication for a trigonal distortion, which splits the triplet orbital ground state of Fe 2+ in a doublet and a singlet [6,9].…”

Decomposition of Spinel-Type Nickel Chromium Indium Sulfides—X-Ray Powder Structure Determination

“…Normal spinel-type chromium sulfides MCr S and partially inverse spinel-type indium sulfides MIn S (M"Mn, Fe, Co, and Ni) display complete mutual solid solubility at elevated temperatures (1)(2)(3)(4)(5)(6). These solid solutions show spin glass behavior at low temperatures.…”

Crystal structure and cation distribution of MnCrInS4 from synchrotron powder diffraction data

“…The ternary spinel type sulphides MCr 2 S 4 and MIn 2 S 4 where Μ = Μη, Fe, Co, form complete series of solid solutions at elevated temperatures Brought to you by | New York University Bobst Library Technical Service Authenticated Download Date | 7/4/15 7:34 AM when they have the same M-elements (Darcy et al, 1968;Riedel et al. 1981;Lutz et al, 1983;Lutz et al, 1986).…”