• Huppertz, Hubert
• Teichtmeister, Tobias A.
• Bernhart, Alexander Hugo

Abstract

<jats:title>Abstract</jats:title><jats:p>Orthorhombic crystals of the compounds <jats:italic>γ</jats:italic>-Eu(BO<jats:sub>2</jats:sub>)<jats:sub>3</jats:sub> and <jats:italic>γ</jats:italic>-Gd(BO<jats:sub>2</jats:sub>)<jats:sub>3</jats:sub> were obtained by high-pressure/high-temperature syntheses at 10.5 GPa and 1100 and 900 °C, respectively. The structures were solved by single-crystal X-ray diffraction methods. The two compounds crystallize with four formula units per cell in the space group <jats:italic>Pca</jats:italic>2<jats:sub>1</jats:sub> (no. 29) with the unit cell parameters <jats:italic>a</jats:italic> = 18.2729(7), <jats:italic>b</jats:italic> = 4.4076(2), <jats:italic>c</jats:italic> = 4.2505(1) Å (<jats:italic>Ln</jats:italic> = Eu), and <jats:italic>a</jats:italic> = 18.2591(6), <jats:italic>b</jats:italic> = 4.4055(1), <jats:italic>c</jats:italic> = 4.2477(1) Å (<jats:italic>Ln</jats:italic> = Gd). Their infrared spectra and the luminescence spectrum of <jats:italic>γ</jats:italic>-Eu(BO<jats:sub>2</jats:sub>)<jats:sub>3</jats:sub> are discussed.</jats:p>

Topics

• compound
• x-ray diffraction
• space group
• luminescence
• diffraction method