The monovalent metal ions (Na+) in the interstices can be easily exchanged with divalent ions in solution and are responsible for the ion exchange capacity of the material. δ-Disilicate, which has the empirical formula Na2Si2O5, is an anhydrous alkali silicate that is most important for its...
1.(Minerals) an olive-green mineral of the olivine group, found in igneous and metamorphic rocks. The clear-green variety (peridot) is used as a gemstone. Composition: magnesium iron silicate. Formula: (MgFe)2SiO4. Crystal structure: orthorhombic. Also called:chrysolite ...
Invermiculite, the layer charge per unit cell is between 0.6 and 0.9. This charge is between those of smectites (0.2–0.6) and those of micas (0.9–1). As the hydration water presence is only possible due to the relatively low negative charge of the layers, expandable vermiculite can be...
characteristics, and a method for manufacturing such an olivine type lithium transition metal silicate compound.SOLUTION: An olivine type lithium transition metal silicate compound comprises: a conductive material; and a compound expressed by the general formula, Li(MnM)SiO(where x satisfies the ...
By combining small-angle neutron and X-ray scattering data, and by exploiting the hydrogen/deuterium neutron isotope effect both in water and methanol, we determine the mean formula and mass density of the nanoscale C–S–H gel particles in hydrating cement. We show that the formula, (CaO)1....
Briefly, we compute the electronic contribution to the electrical conductivity with the Kubo–Greenwood formula12 and the ionic conductivity from the electric current autocorrelation function13. In order to investigate the effect of magnetism on our results, we consider non-spin-polarized and spin-...
A composition for coating comprising at least one compound of formula (I): RSi(R<1>)n(X<1>)3-n, and optionally at least one compound of formula (II): RSi(R<2>)m(X<2>)3-m, wherein R is a straight-chain or branched C(1-24) alkyl g... J Zimmermann,S Seeger,G Artus,.....
These pressures are based on MD simulations and are slightly different from experimental pressures given in Fig. 7. factors SX(Q) were obtained from the raw X-ray scattering data using an analytical programme58 according to the formula, ( Xm ),( Xm )2 SXðQÞ À 1 ¼ IXðQ...
The term ‘C-S-H phase’ is used to denote amorphous or nearly amorphous calcium-silicate-hydrate products of the general formula CaOx·SiO2·H2Oy, where both x and y may vary over a wide range. Such a phase, together with calcium hydroxide, is produced in the hydration of C3S at tem...
one charge. Charge-balance is maintained by a single large Na1+or K1+ion inalkali feldsparsand by Ca2+in anorthite (with 2 Al3+per formula unit). The characters of the chemical substitutions in plagioclase and alkali feldspars are therefore different and this strongly influences their behavior...