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Californium(III) Polyborate
Californium polyborate is a covalent compound with formula Cf 6O8(OH)5 In this compound the californium is in a +3 oxidation state. This compound is the highest atomic number borate with a visible solid phase. Heavier elements than californium decay too fast to make macroscopic amounts of solid crystals. Californium polyborate is unusual in that californium is covalently bound to the borate. Californium was expected to resemble lanthanide elements in being highly ionic. The polyborate anion is polarisable and flexible. The 5f, 6d, 7s, and 7p orbitals of californium are all involved on the bonding. Most valence electrons are in the 5f orbital, and a significant fraction () in the 6d orbital, and smaller fractions of one electron are in the 7s and 7p orbitals. Formation Californium(III) polyborate can be made by autoclaving a californium(III) chloride solution in water with excess boric acid for a week at 240°C. This is then cooled slowly to room temperature for another three day ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Antiprismatic Molecular Geometry
In chemistry Chemistry is the science, scientific study of the properties and behavior of matter. It is a natural science that covers the Chemical element, elements that make up matter to the chemical compound, compounds made of atoms, molecules and ions ..., the square antiprismatic molecular geometry describes the shape of chemical compound, compounds where eight atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a square antiprism. This shape has D4d molecular symmetry, symmetry and is one of the three common shapes for octacoordinate transition metal complexes, along with the dodecahedral molecular geometry, dodecahedron and the bicapped trigonal prismatic molecular geometry, bicapped trigonal prism. Like with other high coordination numbers, eight-coordinate compounds are often distorted from idealized geometries, as illustrated by the structure of Na3TaF8. In this case, with the small Na+ ions, lattice energy, lattice force ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |