Surface properties of the Orgueil meteorite: implications for the early history of solar system volatiles

Details Surface properties of the Orgueil meteorite: implications for the early history of solar system volatiles Surface properties of the Orgueil meteorite: implications for the early history of solar system volatiles

Mar 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974gecoa..38..453f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 38, Issue 3, pp.453-470

Other

6

Scientific paper

Dehydration of Orgueil by stepwise calcination produced more than a tenfold change in its Kr B.E.T. surface area, which increased to 120 m 2 /g, then fell to 40 m 2 /g. This phenomenon characterizes structures of the montmorillonite type, but not other plausible constituents of Orgueil. It results from vacating of interlayer sites by H 2 O molecules which are replaced by Kr until finally the sheets collapse, excluding Kr. Differential calorimetric scans of Orgueil also gave a better match for montmorillonite than for other minerals. However, a simple identification as montmorillonite conflicts with chemical analyses of Orgueil phyllosilicates. Exchangeability of H 2 O in Orgueil was shown by water regain from lab air between calcination cycles and similarily of the cycles. Room temperature dehydration revealed up to 6 per cent free surface adsorbed water. High D/H ratios in CI's may result from D enrichment in OH - groups during equilibration of dispersed phyllosilicate dust with nebula gas at temperatures <<0°C. Adsorption on the very large free and interlayer surface areas of this dust was the major mechanism by which volatiles still uncondensed at the time of gas-dust separation (including planetary primordial Ar, Kr and Xe) were incorporated into solid solar system material.

Affiliated with

Also associated with

No associations

Rating

Surface properties of the Orgueil meteorite: implications for the early history of solar system volatiles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Surface properties of the Orgueil meteorite: implications for the early history of solar system volatiles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface properties of the Orgueil meteorite: implications for the early history of solar system volatiles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1797108