Elektroneutrale Pb4O4 -Heterokubaneinheiten in den Aluminatsodalithen Ln4[Al12O24](Pb4O4)2 (Ln = Nd, Sm) / Electrically Neutral Pb4O4 Heterocubane Units in Aluminate Sodalites Ln4[Al12O24](Pb4O4)2 (Ln = Nd, Sm)
1997 ◽
Vol 52
(4)
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pp. 449-452
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Keyword(s):
Abstract Single crystals of Ln4[Al12O24](Pb4O4)2 (Ln = Nd, Sm) have been prepared by flux techniques. The compounds crystallize with cubic symmetry, space group Oh-Pn3̄m, aNd = 9.514(1), aSm = 9.481(1) Å, Z = 1. The crystal structure is characterized by a [Al12O24]12- framework. Four of the eight six-membered rings of AlO4-tetrahedra per sodalite cage are centered by Ln3+ ions. The cages of the resulting electrically neutral network are filled with [Pb4O4]±0 heterocubane units. Oxygen of the heterocubane units completes the coordination spheres of the rare earth ions to hexagonal bipyramids.
1996 ◽
Vol 51
(6)
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pp. 883-887
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1995 ◽
Vol 50
(8)
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pp. 1146-1150
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1994 ◽
Vol 49
(9)
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pp. 1277-1281
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