Li6B18(Li2O)x : A boride with a porous framework of B6 octahedra

The synthesis and crystal structure of the red transparent lithium boride Li6B18(Li2O)x (0 < x < =1) is reported. The lattice constants are a=8.21708(17)A and c=4.15893(16)A for x=0.26 (powder data), a=8.223(4)A and c=4.160(2)A for x=0.7 (single crystal data), a=8.21179(16)A and c=4.14485(13)A...

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Veröffentlicht in:	Solid state sciences 2007-06, Vol.9 (6), p.459-464
Hauptverfasser:	WOÖLE, Michael, NESPER, Reinhard, MAIR, Gunther, VON SCHNERING, Hans Georg
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Inorganic compounds Physics Single-crystal and powder diffraction Structure of solids and liquids crystallography Structure of specific crystalline solids X-ray diffraction and scattering
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Beschreibung
Zusammenfassung:	The synthesis and crystal structure of the red transparent lithium boride Li6B18(Li2O)x (0 < x < =1) is reported. The lattice constants are a=8.21708(17)A and c=4.15893(16)A for x=0.26 (powder data), a=8.223(4)A and c=4.160(2)A for x=0.7 (single crystal data), a=8.21179(16)A and c=4.14485(13)A for x=0.9 (powder data). The compound crystallizes in the space group P6/mmm (no. 191). The crystal structure consists of B6 octahedra forming a 3-dimensional network with large open channels. This compound has remarkable topological similarities with hexagonal tungsten bronzes and zeolites and is only formed, when a template is present during the synthesis.
ISSN:	1293-2558 1873-3085
DOI:	10.1016/j.solidstatesciences.2007.03.029