pedogenesis and clay mineralogy of soils and rock samples were studied in a transect of calcareous, gypsiferous, saline soils and sediments of bakhtegan lake bank in southern iran. the main objectives of study were to determine the occurrence of clay minerals and factors controlling their distribution pattern and relative abundance in soils and parent materials. the soil parent material is high...

to this solution, the edge-situated interlattice sites become occupied by ions other than K, presumably leading Nickel sorption in illite suspensions was studied as a function of to partial opening of the interlattice space (Bolt et al., pH (4.5–8.0), reaction time (3 h, 24 h, and 1 wk) and ionic strength (I 5 0.1 and 0.003 M ) using x-ray absorption spectroscopy (XAS) to 1979). characterize th...

Abstract The rising energy demands worldwide and difficulty in developing novel clean sources have greatly stimulated the exploitation of coalbed methane. Clay minerals are common fractions coal; thus, understanding their CH 4 adsorption capacities pore structures is vital. In this study, coal, parting, roof, floor samples were collected from Yangquan Mining District. mineral compositions, capa...

Recent studies have suggested that the structural Fe(III) within phyllosilicate minerals, including smectite and illite, is an important electron acceptor for Fe(III)-reducing microorganisms in sedimentary environments at moderate temperatures. The reduction of structural Fe(III) by thermophiles, however, has not previously been described. A wide range of thermophilic and hyperthermophilic Arch...

-Sorption isotherms for four gases (N2, A, Kr and C O 2 ) , commonly used in specific surface area and pore structure measurements, have been accurately determined on a number of clay mineral and oxide systems. Specific surface areas obtained by application of the BET theory to these isotherms illustrate the extent to which the apparent cross-sectional areas for these sorbed gases vary with sur...

Soil physical and chemical characteristics play a key role on vine growth yield. The soils of South Uruguay display high content montmorillonite or illite. proportion these minerals deserves special attention as they influence the soil structure its hydrological properties. present study was conducted in 1.1 ha vineyard this region (Canelones), characterized by heterogeneity plant vigour. It ai...

-Published chemical data for suites of mixed-layer minerals from diagenetic sedimentary rocks, hydrothermally altered tufts, and a metasomatic bentonite bed indicate that the layer charge and composition of the different components of illite/smectite (I/S) differ from one geological environment to another. It appears that the composition of the elemental smectite and illite layers in the I/S is...

REPORTS Potassium Content of Illite: C. E. Weaver .................................... Crystal Packing of Molecules: D. E. Williams ................................ Constant Volume, Self-Filling Nanoliter Pipette: Construction and Calibration: D. J. Prager, R. L. Bowman, G. G. Vurek ............................... Late-Wisconsin End Moraines in Northern Canada: G. Falconer, J. T. Andrews, J. D....