ChemInform Abstract: High‐Pressure Syntheses and Characterization of the Transition Metal Borates β‐MB₄O₇ (M: Mn²⁺, Ni²⁺, Cu²⁺).

Abstract

Structure D 2000High-Pressure Syntheses and Characterization of the Transition Metal Borates β-MB 4 O 7 (M: Mn 2+ , Ni 2+ , Cu 2+ ). -The title compounds are synthesized from stoichiometric mixtures of B2O3 and MnO2, NiO, or CuO (7.5 GPa, 1000°C (Mn), 1150°C (Ni), 550°C (Cu)). The compounds crystallize isotypically to β-ZnB4O7 in the space group Cmcm with Z = 4 (single crystal XRD). The structures exclusively consist of BO4 tetrahedra, which form a network with channels of four-and six-membered rings. The transition metals are located within the six-ring channels. The compounds are further characterized by magnetic susceptibility measurements and UV/VIS spectroscopy. -(KNYRIM, J. S.; FRIEDRICHS, J.; NEUMAIR, S.; ROESSNER, F.; FLOREDO, Y.; JAKOB, S.; JOHRENDT, D.; GLAUM, R.; HUPPERTZ*, H.; Solid State Sci. 10 (2008) 2, 168-176; Fachbereich Chem. Biochem.,