New Borate LaB_5O_8(OH)_2 centre dot 1.5H_2O with a {4[3T + DELTA] infinity infinity + DELTA} infinity infinity infinity Complex Framework. Its Place in the Structural System Based on Symmetry and Topology Analysis in Terms of the OD Theory

A. G. Ivanova; E. L. Belokoneva; O. V. Dimitrova

首页> 外文期刊>Russian Journal of Inorganic Chemistry >New Borate LaB_5O_8(OH)_2 centre dot 1.5H_2O with a {4[3T + DELTA] infinity infinity + DELTA} infinity infinity infinity Complex Framework. Its Place in the Structural System Based on Symmetry and Topology Analysis in Terms of the OD Theory

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New Borate LaB_5O_8(OH)_2 centre dot 1.5H_2O with a {4[3T + DELTA] infinity infinity + DELTA} infinity infinity infinity Complex Framework. Its Place in the Structural System Based on Symmetry and Topology Analysis in Terms of the OD Theory

机译：新的硼酸盐LaB_5O_8（OH）_2中心点1.5H_2O具有{4 [3T + DELTA]无限无穷大+ DELTA}无限无穷大复杂框架。基于OD理论的对称性和拓扑分析在结构系统中的位置

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Crystals of a new hydrous rare-earth borate LaB_5O_8(OH)_2 centre dot 1.5H_2O (1), space group P2_1, are prepared hydrothermally. The crystal structure is solved using the heavy-atom method without a priori knowledge of the chemical formula. The complex_anionic radical is built of pleated layers, which are structurally and topo-logically related to layered pentaborates but do not have the fifth boron polyhedron in the building block; these layers are linked into the {4[3T + DELTA] infinity infinity + DELTA} infinity infinity infinity framework through BO_3 triangles. Lanthanum atoms reside in valleys of the layers; framework voids are occupied by water molecules. The framework of the new borate in its topology and symmetry is an analogue of the centrosymmetric variety of lead borate (hilgardite): in both, the layers are apolar and are type I in terms of the OD theory.

机译：水热法制备了新的水合稀土硼酸盐LaB_5O_8（OH）_2中心点1.5H_2O（1）的晶体，其空间群为P2_1 / n。使用重原子方法可解决晶体结构，而无需事先了解化学式。 complex_阴离子自由基是由打褶的层构成的，这些打褶的层在结构和拓扑上与分层的五价硼酸盐有关，但在结构单元中没有第五个硼多面体。这些层通过BO_3三角形链接到{4 [3T + DELTA]无穷大+ DELTA}无穷大无穷大框架中。镧原子驻留在层的谷中。骨架空隙被水分子占据。新的硼酸盐的拓扑结构和对称性的框架类似于硼酸铅（白铁矿）的中心对称变化：在这两种层中，它们都是非极性的，并且根据OD理论为I型。

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《Russian Journal of Inorganic Chemistry》 |2006年第6期|共7页
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A. G. Ivanova; E. L. Belokoneva; O. V. Dimitrova;
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1. New Borate LaB_5O_8(OH)_2 centre dot 1.5H_2O with a {4[3T + DELTA] infinity infinity + DELTA} infinity infinity infinity Complex Framework. Its Place in the Structural System Based on Symmetry and Topology Analysis in Terms of the OD Theory [J] . A. G. Ivanova, E. L. Belokoneva, O. V. Dimitrova Russian Journal of Inorganic Chemistry . 2006,第6期

机译：新的硼酸盐LaB_5O_8（OH）_2中心点1.5H_2O具有{4 [3T + DELTA]无限无穷大+ DELTA}无限无穷大复杂框架。基于OD理论的对称性和拓扑分析在结构系统中的位置
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New Borate LaB_5O_8(OH)_2 centre dot 1.5H_2O with a {4[3T + DELTA] infinity infinity + DELTA} infinity infinity infinity Complex Framework. Its Place in the Structural System Based on Symmetry and Topology Analysis in Terms of the OD Theory

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