METAL HALIDE ANALOGS OF CHALCOGENIDES - A BUILDING-BLOCK APPROACH TO THE RATIONAL SYNTHESIS OF SOLID-STATE MATERIALS

Principles of solid-state structure and bonding that relate metal-hali de and metal-chalcogenide materials are described through a comparison of binary AX, salts. Structural variation is rationalized by a compar ison of the size and charge of the respective ions, the d-electron cou nt of the cations, and the type of A-X, A-A, and X-X bonding interacti ons. These general bonding considerations are exploited for the constr uction of new metal-halide structure types that are patterned after kn own chalcogenide structures such as metal-halide analogues of silicate s, aluminosilicates, phosphates, and phosphonates.