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Recent APS results: |
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This is the structure of the calcite-water interface based upon recent x-ray specular reflectivity measurements at neutral pH (Fenter et al., 2000. GCA 64, 1221-1228). The presence of a monolayer of "adsorbed" water molecules at the calcite-water interface confirms earlier predictions of surface speciation models (van Cappellen et al. (1993) Geochim. Cosmochim. Acta 57, 3505-3518) and molecular dynamics simulations (de Leeuw et al. (1997) J. Chem. Soc. Faraday Trans. 93, 467-475). |
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The structure of stearate molecules adsorbed to the calcite surface from methanolic solutions as derived from x-ray specular reflectivity measurements (Fenter et al., (1999) Geochim. Cosmochim. Acta 63, 3145-3152). The stearate molecules form a dense monolayer with a coverage of 1 ML and are tilted by 9.5ƒ with respect to the surface normal direction. |
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