Mössbauer spectroscopy of iron in coal

Details Mössbauer spectroscopy of iron in coal Mössbauer spectroscopy of iron in coal

Dec 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.2261l&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 31, Issue 12, pp.2261-2273

Physics

7

Scientific paper

Fe 57 Mössbauer spectra of coal samples were measured in order to obtain information about the so-called "organically-bound" iron in coal. Nine vitrain or whole-coal samples of rank from lignite (72 % C) to anthracite (93 % C) have been investigated. Five coals which were known from chemical analysis to contain sulfide iron yielded the symmetric two-line spectrum of pyrite, with a room-temperature isomer shift relative to sodium nitroprusside of = +0.54 mm / sec and a quadrupole splitting of = 0.58 mm / sec . Five coals which were believed from chemical analysis to contain "organic" iron yielded a symmetric two-line spectrum with = + 1.38 mm / sec and = 2.62 mm / sec . These parameters, including the equality of line intensities, differ from those of any known iron Mössbauer spectrum; they indicate high-spin iron (II) in sixfold co-ordination.

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