structure structure (solids and liquids) D 2000 -006The Hydride Anion in an Extended Transition Metal Oxide Array: LaSrCoO 3 H 0.7 .-The title compound is prepared by reaction of CaH 2 and LaSrCoO 4 (sealed Pyrex tube, 450 • C, 8 d). LaSrCoO 3 H 0.7 crystallizes in the orthorhombic space group Immm, as revealed by powder synchrotron XRD. The structure contains oxide chains bridged by hydride anions to form a two-dimensional extended network. The metal centers are strongly coupled by their bonding with both oxide and hydride ligands to produce magnetic ordering at temperatures up to at least 350 K. The preparation method may prove to be a general route to transition metal oxide hydrides, opening up previously uncharted areas in electronic and magnetic materials synthesis. -(HAYWARD, M. A.; CUSSEN, E. J.; CLARIDGE, J. B.; BIERINGER, M.; ROSSEINSKY, M. J.; KIELY, C.

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