Kinetics of reduction of carbonaceous chondrite material

Details Kinetics of reduction of carbonaceous chondrite material Kinetics of reduction of carbonaceous chondrite material

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978geokh......791m&link_type=abstract

Geokhimiia, May 1978, p. 791-796. In Russian.

Computer Science

Carbonaceous Chondrites, Meteoritic Composition, Reduction (Chemistry), Annealing, Enstatite, Ion Exchanging, Iron, Magnesium, Metal Ions, Mossbauer Effect, Powder (Particles), Reaction Kinetics

Scientific paper

It was found that when carbonaceous chondrite material is annealed in reducing conditions that metallic iron and enstatite are formed, and that these coexist with ferrous olivine. An increase in annealing time does not lead to the inclusion of iron in enstatite, but only increases the amount of the metallic phase. The occurrence of the mineral association during the reduction of carbonaceous meteorites is also a characteristic of enstatic chondrites but not of common chondrites. The explanation involves the process of Fe(2+)-Mg(2+) isomorphic ion exchange in the silicate lattice which is slower than the speed of iron reduction. The data are consistent with a carbonaceous to enstatic to common chondrite developmental sequence.

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