首页> 外文期刊>International Journal of Quantum Chemistry >Crystalline and molecular structures of anhydrous lanthanide perchlorates Ln(ClO4)(3) with Ln = La, Ce, Pr, Sm, Eu, Ho, Er, Tm, and Lu
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Crystalline and molecular structures of anhydrous lanthanide perchlorates Ln(ClO4)(3) with Ln = La, Ce, Pr, Sm, Eu, Ho, Er, Tm, and Lu

机译:Ln = La,Ce,Pr,Sm,Eu,Ho,Er,Tm和Lu的无水镧系高氯酸盐Ln(ClO4)(3)的晶体和分子结构

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The anhydrous perchlorates Ln(ClO4)(3), where ClO4 is coordinated to Ln atoms (Ln = La, Ce, Pr, Sm, Eu, Ho, Er, Tm, and Lu) crystallize in two distinct groups of isostructural species, Rietveld refinements show that from lanthanum to thulium (low temperature form), the crystal system is hexagonal(space group P6(3)/m, Z = 2) with 9.400(3) Angstrom < a < 9.201(1) Angstrom and 5.918(1) Angstrom < c < 5.563(1) Angstrom. The Rietveld refinement converged to R-F = 0.033, R-p = 0.029, and R-wp = 0.053 for Eu(ClO4)(3), The channeled structure is built on the basis of slightly distorted tricaped trigonal Eu centered prisms of nine oxygen atoms belonging to nine tridentate [ClO4]. Thullium thigh temperature form) and lutetium crystallize in trigonal R3c unit cells (Z = 6) with, respectively, a = 8.13286(2) Angstrom, c = 24.1586(1) Angstrom, and a 8.11559(4) Angstrom, c = 24.0047(1) Angstrom. For Lu(ClO4)(3), R-F, R-p, and R-wp mere 0.039, 0.046, and 0.061, respectively, Its molecular structure consists of infinite layers of Lu atoms in a tricaped trigonal antiprism surrounding of oxygens. Layers and linkages between layers are ensured by simultaneously bridging and chelating tridentate [ClO4](3). (C) 1998 Academic Press. [References: 30]
机译:无水高氯酸盐Ln(ClO4)(3),其中ClO4与Ln原子配位(Ln = La,Ce,Pr,Sm,Eu,Ho,Er,Tm和Lu)在两个不同的同构物种群Rietveld中结晶精炼表明,从镧到((低温形式),晶体系统是六方晶系(空间群P6(3)/ m,Z = 2),具有9.400(3)埃<9.201(1)埃和5.918(1) )

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