title: High-Pressure Synthesis and Crystal Structure of Ce4B14O27.
abstract: Ce4B14O27was synthesized under conditions of 2.6 GPa and 750 °C in a Walker-type multianvil apparatus. The crystal structure was determined on the basis of single-crystal X-ray diffraction data, collected at room temperature, revealing that Ce4B14O27is isotypic to La4B14O27. Ce4B14O27crystallizes monoclinically with four formula units in the space groupC2/c(No. 15) and the lattice parametersa= 1117.8(2),b= 640.9(2),c= 2531.7(5) pm, andβ= 100.2(1)°. The three-dimensional boron-oxygen framework consists of [BO4]5-tetrahedra and trigonal-planar [BO3]3-groups. The structure contains two crystallographically different cerium ions. Furthermore, Raman spectroscopy was performed on single crystals of Ce4B14O27.
authors.affiliation: Institut für Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universität Innsbruck Innrain 80-82, 6020 Innsbruck, Austria.
authors.forename: Ernst
authors.initials: E
authors.lastname: Hinteregger
authors.affiliation: Institut für Mineralogie und Petrographie, Leopold-Franzens-Universität Innsbruck Innrain 52, 6020 Innsbruck, Austria.
authors.forename: Lukas
authors.initials: L
authors.lastname: Perfler
authors.affiliation: Institut für Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universität Innsbruck Innrain 80-82, 6020 Innsbruck, Austria.
authors.forename: Hubert
authors.initials: H
authors.lastname: Huppertz
keywords: Borates; Cerium; Crystal structure; High-pressure chemistry; Multianvil