Clays and clay rocks are considered good natural engineered barriers for deep geological disposal of nuclear waste worldwide. Metal corrosion organic degradation in underground repositories generate significant amounts gas that should be able to migrate through the multibarrier system avoid potential pressure buildup, which could compromising integrity host rocks. The is expected accumulate lar...

Supra-glacial material, including light-absorbing impurities (LAI) such as mineral dust of crustal and soil origin, black carbon, algae cryoconite, reduce the reflectance snow glacier ice. The reduction depends on amount LAI their physical chemical properties, which vary spatially temporally. Spectral data ice samples, containing LAI, were collected in ablation zone Djankuat Glacier, Central Ca...

Hydroand glaciovolcanism are processes that have taken place on both Earth and Mars. The amount of materials produced by these processes that are present in the martian surface layer is unknown, but may be substantial. We have used Mars rover analogue analysis techniques to examine altered tuff samples collected from multiple hydrovolcanic features, tuff rings and tuff cones, in the American we...

Abdelmoula, M., see Refait et al., 731 Advocat, T., see Lecturq et al., 871 Akizuki, M., Kuribayashi, T., Nagase, T., and Kitakaze, A.: Triclinic liddicoatite and elbaite in growth sectors of tourmaline from Madagascar, 364 Alapieti, T.T., see Latypov et al., 547 Alba, M.D., Becerro, A.I., Castro, M.A., and Perdigón, A.C.: Hydrothermal reactivity of Lu-saturated smectites: Part I. A long-range ...

-Smectites are one of the most important groups of phyllositicates found in soils and sediments, and certainly one of the most difficult to study. New information about the formation mechanisms, impact of structural features on surface properties, and long-term stability of smectites can best be gained from the systematic study of single-phase specimens. In most instances, these specimens can o...

-Hydrothermal treatment of a mixture of silicic acid, cobalt chloride, sodium dithionite and sodium hydroxide at 250 ~ under 500 psi of argon produced a pink solid. X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and electron diffraction data showed the product to be a well-crystallized smectite. SEM/EDX analysis gave a unit cell formula of [(Si8.05)(Co558)O20(OH)4]Na066....