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首页> 外文期刊>Crystallography reports >New Ln[B6O9(OH)(3)] borates (Ln = Sm-Lu): Structure, properties, and structural relation to cationic Li-4[B7O12]Cl conductors (Li-boracites)
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New Ln[B6O9(OH)(3)] borates (Ln = Sm-Lu): Structure, properties, and structural relation to cationic Li-4[B7O12]Cl conductors (Li-boracites)

机译：新的Ln [B6O9（OH）（3）]硼酸盐（Ln = Sm-Lu）：与阳离子Li-4 [B7O12] Cl导体（Li-硼硅酸盐）的结构，性质和结构关系

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摘要

Crystals of new rare earth borates of the composition Ln[B6O9(OH)(3)](Ln= Sm-Lu), sp. gr. R3c are synthesized under hydrothermal conditions. Their crystal structures are determined on single crystals with Ln = Ho, Gd without preliminary determination of their chemical formulas. The polar anionic framework of the crystals consists of BO3 triangles and BO4 tetrahedra and has wide channels along the threefold axis of the structure, which are similar to the channels along the a, b, and c axes in cubic Li-4[B7O12]Cl boracite with Li conductivity. Rare earth atoms are arranged in the structure over the cubic F pseudolattice, whereas the analogous positions in Li boracites are filled with Cl anions. The squared optical nonlinearity of the new crystals is comparable with the nonlinearity of quartz, whereas the electrical conductivity in borates at 300degreesC exceeds 10(-6) S/cm. (C) 2004 MAIK "Nauka/Interperiodica".
机译：组成为Ln [B6O9（OH）（3）]（Ln = Sm-Lu），sp的新稀土硼酸盐晶体。 gr。 R 3c在水热条件下合成。它们的晶体结构是在Ln = Ho，Gd的单晶上确定的，无需预先确定其化学式。晶体的极性阴离子骨架由BO3三角形和BO4四面体组成，并在结构的三重轴上具有较宽的通道，类似于立方Li-4 [B7O12] Cl中沿a，b和c轴的通道。具有锂电导率的硼铁矿。稀土原子排列在立方F伪晶格上的结构中，而Li硼铁矿中类似的位置充满Cl阴离子。新晶体的光学非线性平方可与石英的非线性媲美，而硼酸盐在300℃时的电导率超过10（-6）S / cm。 （C）2004 MAIK“ Nauka / Interperiodica”。

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