The values for ionic radii of cations as given byAhrens (1952) permit a better correlation than those ofGoldschmidt.A shrinkage of 0.01 in the unit cell size per 0.01 decrease in the ionic radius of the divalent cations was determined when spinels with the same cation arrangement in the same...
Finally, in situations where there is a cavity of a specific size, it is possible that the ionic radii of the metal ion will be a determinant in cofactor selection (Table 1; Mg2+ < Cu2+ < Zn2+ < Co2+ < Ni2+ < Fe2+ < Mn2+ < Cd2+ < Ca2+). However, typically other factors ...
D. Revised Effective Ionic Radii and Systematic Studies of Interatomic Distances in Halides and Chalcogenides. Acta Crystallogr., Sect. A: Cryst. Phys., ... Z Barandiarán,L Seijo - 《Canadian Journal of Chemistry》 被引量: 323发表: 1992年 The ab initio model potential method: Lanthanide and...
A-site cations consist of an alkaline earth metal and have a slightly larger ionic radii than B-site cations, which are normally transition metals (Fig. 2a). In reducing conditions, the remarkable stability of layered perovskite oxide materials with an A2BO4-type structure is apparent. Their ...
Assuming fixed values of radii of B and X for a given lattice constant a, T < 1 corresponds to a loosely packed crystal structure with small radius of A and T > 1 corresponds to a tightly packed crystal structure with large radius of A (Fig. 1b). This indicates ...
Assuming fixed values of radii of B and X for a given lattice constant a, T < 1 corresponds to a loosely packed crystal structure with small radius of A and T > 1 corresponds to a tightly packed crystal structure with large radius of A (Fig. 1b). This indicates ...
Given the small tip radii used (R ~ 10 nm) the applied approach speed is slow enough to suppress dynamic effects due to viscous drag36. In any case we also tested much slower approach speeds of 20 nm/s as and did not find any differences (see Figure S3). We want to ...
The importance of ionic radii in determining the structure obtained for sodium transition metal sulfates: Tuning structure through transition metal and selenate dopingSodium ionSulfateSelenateAlluauditeCrystal structureMaterials with the alluaudite structure have been attracting increasing interest due to ...
The decreasing radii of the curves as the temperature rises is explained by a corresponding alteration in impedance — a critical electrical property of the material [49]. Additionally, it is evident that the semicircles are dispersed with relation to the actual axis, suggesting a Cole-Cole forma...
At each φ, a quadratic least-squares fit is performed on the γ-dependent minimized free energies, yield- itnergmTthhoeefcctuohrnevtEaatcEutIrpmeoootefdntehtlieaalfsCraeeep=erneufear(chgtyo=rw, ii0ts)h,dwrifefhsipcicuehclttetntootedtrhesteethsrtmeradiinoneuabptlrγeelc=aiysee0lry, rfe...