Abstract
Explorative high‐pressure/high‐temperature syntheses (7 GPa, 800 °C) starting from Er2O3, CdO, and H3BO3 yielded single‐crystals of the hitherto unknown compound ErCd2B7O13(BO(OH)3). This compound crystallizes trigonally in the non‐centrosymmetric space group R3c with the unit cell parameters a = 8.8418(2) Å, c = 22.4972(8) Å, and 6 formula units per cell. The crystal structure is composed by corner‐sharing trigonal planar [BO3] and tetrahedral [BO4] groups, forming a complex three‐dimensional framework. In this article, the structural data and characteristics of ErCd2B7O13(BO(OH)3) are presented in detail. Furthermore, the compound´s infrared spectrum is discussed.
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