Magnetomineralogical features of magnetite from different sedimentary rocks and deposits
N.A. Sed'mov$^1$, V.F. Babanin$^1$, V.V. Morozov$^1$, A.A. Zalutskii$^1$, V.I. Trukhin$^2$,
Moscow University Physics Bulletin 2004. 59. N 1. P. 70
Magnetic fractions recovered from various types of soils and deposits have been
studied by the methods of Mossbauer spectroscopy, magnetic measurements,
X-ray diffractometry, scanning electron microscopy, and elemental microanalysis.
The main component of the magnetic fractions was magnetite. Based
on the shape of a Mossbauer spectrum, width and intensity of spectral lines,
magnetomineralogical characteristics of natural magnetite have been identified
and the degree of vacancies in its structure has been computed ($v=0.03\div 0.14$).
It is shown that this parameter of magnetite depends on the redox environment
in the formation medium.