Tochilinite Produced in Laboratory

Details Tochilinite Produced in Laboratory Tochilinite Produced in Laboratory

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..695k&link_type=abstract

Lunar and Planetary Science, volume 27, page 695

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Chondrites: Carbonaceous, Mineralogy, Synthesis, Tochilinite

Scientific paper

Tochilinite was firstly identified in the serpentinites from Voronezh region, Russia, in 1971. Later this mineral was recognized to be a major matrix phase of the most primitive carbonaceous chondrites (CI, CM) where tochilinite as a mixed-layer structure occurs among serpentine group minerals, olivine, pyroxene, pyrrhotite etc. Terrestrial tochilinite has been suggested to result from low-temperature hydrothermal alteration of serpentinite. The origin of the chondritic tochilinite is still not known, partly because of failure to synthesis this mineral. As for as we know, since 1971, there was no publication about successful synthesis of tochilinite. Here we present results of the first laboratory synthesis of tochilinite as a product of interaction of Fe(II) hydroxides with H2S at 80 degrees C, and total concentration of reduced sulfur ions in solution lower than 10-4M at pH 7.8 and lower than 1M at pH 11.5.

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