LaMg2PdH7, a new complex metal hydride containing tetrahedral PdH4 (4-) anions

Citation:
Yvon, K, Rapin JP, Penin N, Ma Z, Chou MY.  2007.  LaMg2PdH7, a new complex metal hydride containing tetrahedral PdH4 (4-) anions, Oct. Journal of Alloys and Compounds. 446:34-38.

Abstract:

Hydrogenation of the inten-netallic compound LaMg2Pd at 200 degrees C and 10 bar leads to a complex metal hydride of composition LaMg2PdH7. Its structure has orthorhombic symmetry and displays tetrahedral [PdH4](4-) anions. The Pd-H bond distances as measured on the deuteride range from 1.71 to 1.78 angstrom and the H-Pd-H bond angles from 95 degrees to 122 degrees. Three additional hydride anions H- occupy La2Mg2-type interstices having tetrahedral metal configurations. Band structure calculations suggest the hydride to be non-metallic and to have a band gap of similar to 1.0ev. The compound desorbs hydrogen at 125 degrees C yielding a pressure of more than I bar absolute. (C) 2006 Elsevier B.V. All rights reserved.

Notes:

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