Experiments were performed to measure the isotopic fractionation of boron between illite/smectite (I/S) clay minerals and water as a function of temperature (300° and 350°C) and degree of illitization. Corresponding changes in the oxygen isotopes were monitored as an indication of the approach to equilibrium. The kinetics of the B-isotope exchange follows the mineralogical restructuring of smec...

This paper reports the mineralogical and geochemical compositions of the Late Permian C2, C5a, C5b, C6a, and C6b semianthracite coals from the Mahe mine, northeastern Yunnan, China. Minerals in the coals are mainly made up of quartz, chamosite, kaolinite, mixed-layer illite/smectite (I/S), pyrite, and calcite; followed by anatase, dolomite, siderite, illite and marcasite. Similar to the Late Pe...

To study the mechanical effect of clay under acidic and basic conditions, typical minerals, montmorillonite illite, were taken as main research objects in this study. The variation law mechanism cohesive force internal friction angle studied by immersing remoulded soil HNO 3 solution with pH = NaOH (alkaline waste liquid) 13.5, respectively. It was found that, a corrosion reaction between miner...

Clay minerals are common in geological samples and useful paleoclimate sediment provenance proxies. Acid pretreatment is the most method for separation purification of clay minerals. Given that hydrochloric acid (HCl) can dissolve chlorite distinguish it from kaolinite, HCl digestion used to simplify routine mineral analysis. However, there have been few studies effects on different context ext...

-An indirect Fourier transformation applied to small-angle X-ray scattering data has been used to determine the thickness and surface properties of two common clay minerals. For an illite system, the particle density distribution function (PDDF) generated by the analysis gave a correct description of particle geometry, and the calculated electron density profile was in accordance with the theor...

The long-term safe storage of CO2 in geological reservoirs requires the understanding impact on clay-rich sealing cap rocks. reactivity mixed layer illite-smectite was investigated to determine reaction pathways under conditions supercritical (scCO2) context storage. A common clay (blue marl from Guadalquivir Tertiary basin, southern Spain) tested brine scCO2 (100 bar and 35 °C) for 120 240 h. ...

In case of nuclear accident, 90Sr and 134,137Cs are major radionuclides to account. previous works (Appl. Geochem. 87, 167; ibid 93, 167), a database ion-exchange parameters allowing the description Sr2+ Cs + adsorption on purified illite smectite was developed for multi-site (MSIE) model. this study, behaviours Cs+ were obtained with <150 ?m fractions French soil samples: cambisol fluvic, calc...