Synthesis and crystal structure of β-AlD3

• Published in: Journal of alloys and compounds Vol. 433; no. 1-2; pp. 180 - 183
• Main Authors: BRINKS, H. W, LANGLEY, W, JENSEN, C. M, GRAETZ, J, REILLY, J. J, HAUBACK, B. C
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier 16-05-2007
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Inorganic compounds; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Powder neutron diffraction; Cubic lattices; Metal hydrides; Powders; Space groups; Neutron diffraction; Thermal decomposition; Aluminium Deuterides; XRD; Alane; Pyrochlore type compound; Synthesis; Atomic arrangement; Crystallographic site; Synchrotron radiation; Crystal structure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.06.072

beta-AlD3 was synthesized from LiAlD4 and AlCl3 via thermal decomposition of aluminum hydride etherate in presence of LiBH4 and excess LiAlD4. beta-AlD3 was determined by powder neutron diffraction and synchrotron X-ray diffraction to take the pyrochlore structure and it crystallizes in space group . The cubic structure has unit-cell dimension a=9.0037(1)A and consists of corner-sharing AlD6 octahedra where each hydrogen is shared between two octahedra. Each of the six octahedra surrounding an octahedron is interconnected to two of the other surrounding octahedra. The octahedra are forming a 3D network with about 3.9A channels. There is one Al and one D crystallographic site and the Al-D distance is 1.712(1)A.