Christopher A. Colla

TL;DR: In this article, elemental and isotopic data detailing how the Mg isotope system behaves in natural and experimentally synthesized clay minerals is presented, and it is shown that the bulk mg isotopic composition (δ 26 Mg) of a set of natural illite, montmorillonite and kaolinite spans a 2' range, and that their isotope composition depends strongly on a balance between the relative proportions of structural and exchangeable mg.

TL;DR: In this paper, the authors show that the amount of isotopic fractionation between solid and solution (ΔLisolid-solution) varies with the number of lithium taken up into the gibbsite structure, which itself depends upon the extent of conversion and also varies with electrolyte concentration and in the counter ion in the order: ClO4−, NO3− or ClO 4−.

TL;DR: Quantitative chemical calculations indicate that the most stable U2O7 conformer consists of two bent (UO2)(2+) uranyl ions bridged by a peroxide group bidentate and parallel to each uranyl ion, and a μ2-O atom, resulting in charge neutrality.

TL;DR: In this article, the aqueous-mineral Δ44/40Casolid-solution fractionation factors were measured for equilibrating solutions and a set of inorganic solids that trap solvated calcium in six, seven and eight coordination as an intact ion in the lattice.

TL;DR: A facile synthesis of the little known cluster Al8 (OH)14 (H2 O)18 (SO4 )5 (Al8 ) through a simple dissolution method is reported, which produces a discrete Al cluster on a scale suitable for studies and applications in materials science.