The structures of pure metals are simple to describe since the atoms that form these metals can be thought of as identical perfect spheres. More specifically the metallic structure consists of 'aligned positive ions' (cations) in a "sea" of delocalized electrons. This means that the electrons ...
The collective and single-particle dynamics in the intermetallic compound Fe 3 Si with the DO 3 structure have been investigated using first-principles density-functional calculations in combination with statistical mechanics in the grand-canonical ensemble. The dispersion relations and the density of sta...
In metals, the atoms are strongly held together in a rigid crystal structure called a lattice (a bit like scaffolding or a climbing frame with atoms at the joins and invisible bars holding them together). You can easily separate one "piece" of water from another (by lifting some out with...
How do rocks have energy? In terms of energy band structures, briefly explain how solids can be classified as metals, insulators, and semiconductors. Why do solids conduct better heat than liquids and gases? Describe waves and particles.
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Why can transition metals form bonds with more than one ion? How can one tell what bonds have been broken and what bonds have been formed from a chemical reaction? In ionic bonding, why are atoms losing an electron forms positive ions but not negative ions, and similarly atoms gains an el...
A subject for further reading when I have spare time. Yes, at room temperature the electronic thermal conductivity is typically much larger in metals than the lattice (phonon) thermal conductivity, but to actually handle that there is really no way around quantum mechanics so ...
have structures such as hexagonal close-packed and cubic close-packed which I am not sure I can describe. It's not until you get an actual model yourself and you can show that they are different and you can actually see they are different, but metals will hold to one structure or ...
The stable structure is the one for which the Fermi energy lies in a minimum in the density-of-states (DOS) distribution, as in the binary compounds. The results are explained on the basis of a simple model involving charge transfer to alloying additions on the Al sublattice....
The reason alkali metals do not form non-stoichiometric hydrides is that they typically form ionic hydrides, which have a defined stoichiometry. The ionic hydrides consist of a metal cation and a hydride anion (H⁻), leading to a stable ionic lattice structure, unlike the variable compositions...