High-Pressure Synthesis, Crystal Structure, and Properties of the New Orthorhombic Rare-Earth meta-Oxoborates RE(BO2)3 (RE = Dy – Lu)

• Published in: Zeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 59; no. 2; pp. 202 - 215
• Main Authors: Emme, Holger, Nikelski, Tanja, Schleid, Thomas, Pöttgen, Rainer, Möller, Manfred Heinrich, Huppertz, Hubert
• Format: Journal Article
• Language: English
• Published: Verlag der Zeitschrift für Naturforschung 01.02.2004
• Subjects: Crystal Structure; Keywords High-Pressure; Oxoborates
• ISSN: 0932-0776; 1865-7117
• DOI: 10.1515/znb-2004-0213

The new orthorhombic meta-oxoborates RE(BO (≡REB ) (RE = Dy-Lu) have been synthesized under high-pressure and high-temperature conditions in a Walker-type multianvil apparatus at 7.5 GPa and 1100 °C. They are isotypic to the known ambient pressure phase Tb(BO , space group Pnma. In contrast to Dy(BO , which was also obtained in small amounts under high-temperature conditions, the preparation of the higher orthorhombic homologues RE(BO (RE = Ho-Lu) was only possible using high-pressure. The meta-oxoborates RE(BO (RE = Dy-Er) were synthesized as pure products, whereas the orthorhombic phases with RE = Tm-Lu were only obtained as byproducts. With the exception of Yb(BO it was possible to establish single crystal data for all compounds. The results of temperature-resolved in-situ powder-diffraction measurements, DTA, IR-spectroscopic investigations, and magnetic properties are also presented.