The comparison of these ordering phenomena in the aluminates and the corresponding superconducting cuprates is taken into account. 展开 关键词: Intergrowth type aluminates Calcium ordering Bonding anisotropy DOI: 10.1016/S1466-6049(00)00099-4
Laing, A Tetrahedron of Bonding, Education in Chemistry, November, pp160-163 (1993):Representative species: Metallic materials: Copper, Cu, magnesium, Mg, sodium, Na, and chromium, Cr Ionic materials: Sodium fluoride, NaF, magnesium fluoride, MgF2, sodium chloride, NaCl, and calcium oxide,...
The Genomics of disulfide bonding and protein stabilization in thermophiles PLoS. Biol., 3 (2005), pp. 1549-1558 Google Scholar Berry and Pelicic, 2015 J.L. Berry, V. Pelicic Exceptionally widespread nanomachines composed of type IV pilins: the prokaryotic Swiss Army knives FEMS Microbiol. Re...
摘要: One adhesive film composition includes an elastomer resin, has one or more hydroxyls, a carboxyl or an epoxy group, a film-forming resin, the solidified resin of a silylated phenol, an epoxy resin, a curing accelerator and a filler.收藏...
These types include iron-rich, spherical iron, chlorite, pyrite, calcium ferrites, etc. If there were no other major elements observed besides the iron, the particle would be assigned as iron-rich unless the aspect ratio (length to width) is less than 1.33:1. For such a situation, the ...
at least one kind of the indicators which can made the optically detectable change by bonding to the calcium ions in this order on a light transmittable water impermeable base and contains a pH buffer in at least any one layer thereof. The total content of the calcium and materials analogous...
(calciumcarbonate) type adhesive, clay (clay, the main component of SiO2, Al2O3) is self-adhesive material, SiO2 (silica)-type is not adhesive materials, mica (talc) self-adhesive materials, adhesive materials in TiO2 (titaniumdioxide) and compound (two or more filling)-type self-adhesive ...
Transition metal ions have anomalously large effective charges, though in the double perovskite CaAl 1/2Nb 1/2O 3 (CAN), the effective charge of Nb is significantly lower than in the simple perovskite KNbO 3, showing different Nb–O bonding chemistry. Tolerance factors, cation chemistry, and...
Semi-empirical band structure calculations for CaRhIn and CaRhIn2 reveal strong bonding In–In and Rh–In but weaker Ca–Rh and Ca–In interactions. Magnetic susceptibility and resistivity measurements of compact polycrystalline samples of CaRhIn2 indicate weak Pauli paramagnetism and metallic conductivi...
However, there are different levels of covalent bonding. Carbon can form nonpolar covalent (pure covalent) bonds when it bonds to itself, as in graphene and diamond. Carbon forms polar covalent bonds with elements that have a slightly different electronegativity. The carbon-oxygen bond is a polar...