Dolomite-II: A high-pressure polymorph of CaMg(CO3)2

Details Dolomite-II: A high-pressure polymorph of CaMg(CO3)2 Dolomite-II: A high-pressure polymorph of CaMg(CO3)2

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30b..26s&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 2, pp. 26-1, CiteID 1054, DOI 10.1029/2002GL016018

Physics

3

Mineral Physics: High-Pressure Behavior, Mineral Physics: Optical, Infrared, And Raman Spectroscopy

Scientific paper

We have measured the infrared spectra and x-ray diffraction of CaMg(CO3)2-dolomite to pressures of 50 GPa at 300 K. We observe both splittings and disappearances of x-ray diffraction peaks initiating near 20 GPa, as well as new bands in the infrared spectrum of dolomite. The onset of the changes in both the x-ray and infrared data appears to be gradual, and thus kinetically impeded: this is consistent with previous shock results. The infrared and x-ray data are consistent with dolomite adopting a calcite-III-like structure. Our results indicate that high-pressure polymorphism in dolomite could stabilize CaMg(CO3)2 in the deep mantle, and thus that high-pressure polymorphs of dolomite could represent the main reservoir for carbon storage within Earth's lower mantle.

Affiliated with

Also associated with

No associations

Rating

Dolomite-II: A high-pressure polymorph of CaMg(CO3)2 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 Dolomite-II: A high-pressure polymorph of CaMg(CO3)2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dolomite-II: A high-pressure polymorph of CaMg(CO3)2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1527448