Influence Of Chemical Composition On The Crystalline Morphologies Of Magnetite

  title={Influence Of Chemical Composition On The Crystalline Morphologies Of Magnetite},
  author={T. Clark and B. J. Evans},
  journal={1997 IEEE International Magnetics Conference (INTERMAG'97)},
  • T. Clark, B. J. Evans
  • Published 1997
  • Materials Science
  • 1997 IEEE International Magnetics Conference (INTERMAG'97)
Cubic and octahedral magnetite specimens from a variety of localities have been examined to ascertain the influence of chemical composition on their morphology. The presence of cations which favor occupancy of the A site in the magnetite spinel structure is shown to be significant in the formation of cubic magnetite at concentrations of x=0.02 in the formula Zn/sub x/Fe/sub 3-x/O/sub 4/, with unusual order-disorder phenomena accompanying this change in habit. 

Figures from this paper

Manganese in biogenic magnetite crystals from magnetotactic bacteria.
It is shown that magnetite crystals produced by uncultured magnetotactic bacteria can incorporateManganese up to 2.8 atom% of the total metal content (Fe+Mn) when manganese chloride is added to microcosms. Expand
Separation of paramagnetic and ferrimagnetic anisotropies: A review
[1] The magnetic anisotropy of rocks results from the contributions of diamagnetic, paramagnetic, and ferromagnetic (in the broad sense) minerals. This bulk anisotropy of magnetic susceptibility,Expand
The effect and role of environmental conditions on magnetosome synthesis
A series of studies that showed how changes in environmental factors such as temperature, pH, external Fe concentration, external magnetic fields, static or dynamic fluid conditions, and nutrient availability or concentrations can all affect the biomineralization of magnetite magnetosomes in MTB are reviewed. Expand
Identification of simultaneous U(VI) sorption complexes and U(IV) nanoprecipitates on the magnetite (111) surface.
The findings extend the range of conditions under which U(VI)-CO(3)-Ca complexes inhibit U reduction and suggest that U reduction is limited to defect-rich surface regions. Expand
224-239 Magnetite MJ08.indd
  • 2008


Coercivity of Fe 2+ in octahedral sites of Fe-Ti spinels
High coercivities (∼1.8 to 8.1 kOe) have been observed in polycrystalline titanium substituted magnetites at 77°K. This property and unusually large ( \sim10^{7} ergs. cm-3) anisotropy constantsExpand
Cationic distribution and oxidation kinetics of divalent manganese ions in iron manganite spinels Mn3 − xFexO4 (0 < x < 1.50)
Abstract A quantitative analysis by derivative thermogravimetry based on the difference of reactivity in oxygen of Mn 2+ ions of iron manganite spinels Mn 3 − x Fe x O 4 with 0 x 2+ ions show thatExpand
Electric Field Gradients at 57Fe in ZnFe2O4 and CdFe2O4
The nuclear quadrupole coupling constants and isomer shifts of 57Fe in the spinels ZnFe2O4 and CdFe2O4 were measured using the Mossbauer effect. The signs of the quadrupole coupling constants wereExpand
Collective electron description of the conduction mechanism in M x Fe 3-x O 4 , M=Cd,Zn