Topological aspects of infinite metal clusters and superconductors. Technical report

Technical Report · Tue Aug 11 04:00:00 EDT 1987

OSTI ID:6040494

King, R B

This paper summarizes the chemical-bonding topology of infinite metal clusters as well as superconductors constructed from metal octahedra or metal tetrahedra. The chemical-bonding topologies of discrete octahedral metal clusters can be either edge-localized (e.g., Mo 6x8L64+ derivatives), face-localized (e.g., Nb 6x12L62+ derivatives), or globally delocalized (e.g., Zr 6mu2-CL)12ECLn-12 derivatives where E=Be, B, C, N,). Infinite fusion of metal octahedra in one, two, and three dimensions leads to metal-cluster chains (e.g., Gd 2CI3), metal cluster sheets (e.g., Zr CL), and bulk metals, respectively. Superconductors exhibiting relatively high critical temperatures and magnetic fields are constructed from edge-localized metal polyhedra such as the Mo 6 octahedra in the ternary molybdenum chalcogenides (Chevrel phases) and Rh 4 tetrahedra in the ternary lanthanide rhodium borides leading naturally to the concept of porous delocalization in such materials.

• Research Organization: Georgia Univ., Athens (USA). Dept. of Chemistry
• OSTI ID: 6040494
• Report Number(s): AD-A-184104/8/XAB; TR-44
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
BORIDES
BORON COMPOUNDS
CHALCOGENIDES
CHEMICAL BONDS
ELEMENTS
MATHEMATICS
METALS
MOLYBDENUM COMPOUNDS
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM COMPOUNDS
SOLID CLUSTERS
SUPERCONDUCTORS
TOPOLOGY
TRANSITION ELEMENT COMPOUNDS