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Lanthanum square antiprism

It has been suggested that cubic stereochemistry might be possible for discrete 8-coordinate complexes with monodentate ligands. As evidence for the stability, the cubic lanthanum coordination polyhedron in [LafCsHjNOjx ](C104)3 has been cited. This complex is in the form of a square antiprism distorted towards a cube rather than a dodecahedron [94],... [Pg.404]

Hydrates of rare earth chlorides also have two different crystal systems a triclinic system for lanthanum, cerium, and praseodymium, as well as a monoclinic system for neodymium to lutetium and yttrium. CeCl3-7H20, as an example of the former system, is different from the above infinite polymer as two cerium atoms are connected by two [i2-bridges to form a dimer. The formula for this dimer is [(H20)7Ce([i2-Cl)2Ce(H20)7]Cl4 as shown in Figure 1.18. Therefore, the coordination number of cerium is nine and the polyhedron takes on a destroyed mono-capped square antiprism configuration. [Pg.27]

See other pages where Lanthanum square antiprism is mentioned: [Pg.763]    [Pg.763]    [Pg.1081]    [Pg.442]    [Pg.141]    [Pg.142]    [Pg.196]    [Pg.197]    [Pg.113]    [Pg.197]    [Pg.219]    [Pg.2920]    [Pg.510]    [Pg.577]    [Pg.707]    [Pg.261]    [Pg.139]   
See also in sourсe #XX -- [ Pg.763 ]



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