Thermodynamic and structural properties of water adsorbed film on MgO (100) ionic surface |
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Authors: | J. P. Coulomb B. Demirdjian D. Ferry M. Trabelsi |
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Affiliation: | 1. CNRS, CINaM UMR-7325, Aix-Marseille University, 13288, Marseille, France 2. Département de Physique, Faculté des Sciences de Bizerte, Bizerte, Tunisia
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Abstract: | We have investigated by adsorption isotherms and neutron diffraction measurements, respectively the thermodynamic and structural properties of water physisorbed film on MgO (100) powder. Thanks to a high temperature thermal treatment, under vacuum, our MgO powder samples are characterized by a highly homogeneous (100) MgO surface. We have determined the structure of the (2D) water film physisorbed on such an ionic surface. This one is a commensurate P(2×3) structure which is very similar to the (110) planes of ice-VII. Recall that ice VII, which is stable at very high pressure, is characterized by a quite large density (d = 1.6). |
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