On the mössbauer spectrum of FeC2O4 · 2H2O

Menezes, J.; Barros, F. de S.

doi:10.1002/pssa.2210450255

Cited by 9 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The precipitate was collected and dried over CaS04 at room temperature. Anal.1 Caled for C14FeH14N206: C, 46.44; Fe, 15.42; , 3.90; N, 7.74-Found: C, 46.36; Fe, 15.4; H, 3.89; N, 7.72., Fe(C404)(C4H4N2)41/2H20. (Pyrazine)(squarato)iron(II) hydrate was prepared by dissolving FeCl24H20 (1.0 g, 5 mmol) in 1-propanol at -5 °C (ice-salt bath) and then adding solid pyrazine (0.411 g, 5.1 mmol) to this solution.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, magnetic susceptibility, and spectroscopic properties of single- and mixed-valence iron oxalate, squarate, and dihydroxybenzoquinone coordination polymers

Wrobleski¹,

Brown²

1979

Inorg. Chem.

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Synthesis, magnetic susceptibility, and spectroscopic properties of single- and mixed-valence iron oxalate, squarate, and dihydroxybenzoquinone coordination polymers

Wrobleski¹,

Brown²

1979

Inorg. Chem.

View full text Add to dashboard Cite

Low-temperature Mössbauer measurement of a polymeric oxalate (2,2′-bipyridine) iron compound

Krause

Michalk

Benedix

et al. 1985

phys. stat. sol. (a)

View full text Add to dashboard Cite

Mössbauer measurements of the ironorganic polymer [Fe(bipy)ox1.1]n are performed a t 295 and 4.2 K. Theoretical spectra are calculated using a semiclassical spin‐Hamiltonian in the fitting procedure. Iron is submitted in three several states. Two of the three subspectra show magnetic splitting at 4.2 K. This refers to long range order, because a very slowly relaxing paramagnet would be represented by another shape of the spectrum.

show abstract

Electric Field Gradient in Ferrous Oxalate Dihydrate

Śedzińska

1987

Physica Status Solidi (b)

View full text Add to dashboard Cite

Below the NBel temperature the ferrous oxalate dihydrate is characterized by a large electric quadrupole interaction comparable with the dipole magnetic one /1 to 4/. This implies an ambiguity in the determination of the asymmetry parameter p and the angles (8 , (b )describing the orientation of the internal magnetic field (HefJ with respect to the principal axes of the electric field gradient (EFG) /5, 6/. Mossbauer spectra of oc -FeC2O4-2D20 have been measured at 300 and 4.2 K in /4/ to study the deuterium isotope effect. The analysis of the spectrum a t 4.2 K gives the ambiguity region: 76 O< 8 < 90°, Oo< (9 < 18O, and 0.46 < ' 1 c 0.72./7/ has shown, below TN = (16 11' deviation of the magnetic moment direction from the crystal b-axis. Each Fe ion in w-FeC2O4. 2D20 (space group C%/c) is located a t the centre of a distorted octahedron with vertices occupied by four O2 ions of the oxalate groups and arranged in a rectangle with the longer edges parallel to the b-axis. The two other 0 ions, belonging to the water molecules, are situated along the a-axis. To a good approximation, the orthorhombic symmetry of the octahedron may be assumed with the z, y, x axes parallel to the a , b, and c' = c sin B macroscopic axes, respectively. A comparison of the angular ambiguity region with the neutron diffraktion result implies that the Vxx axis of the EFG tensor is directed along the b-axis. Based on the above data it is difficult to decide the orientation of the remaining EFG axes. Therefore the following two possibilities were taken into account in calculations using a computer program /a/: (ii) Vzz parallel to the c' -axis (perpendicular to the a-b plane). Then 8 = = (84 2 1)' and (9 = (11 ? 1)'. The best fit has been obtained for ' 2 = 0.58 2 0.2.On the other hand, the recent neutron diffraction study of a -FeC204-2D20 1) K, the collinear magnetic structure with

show abstract

On the mössbauer spectrum of FeC2O4 · 2H2O

Cited by 9 publications

References 7 publications

Synthesis, magnetic susceptibility, and spectroscopic properties of single- and mixed-valence iron oxalate, squarate, and dihydroxybenzoquinone coordination polymers

Synthesis, magnetic susceptibility, and spectroscopic properties of single- and mixed-valence iron oxalate, squarate, and dihydroxybenzoquinone coordination polymers

Low-temperature Mössbauer measurement of a polymeric oxalate (2,2′-bipyridine) iron compound

Electric Field Gradient in Ferrous Oxalate Dihydrate

Contact Info

Product

Resources

About