Study of an EuBO3–ScBO3 system and EuSc3(BO3)4, EuSc(BO3)2 orthoborates

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 50; no. 39; pp. 13894 - 13901
• Main Authors: Kuznetsov, Artem B, Kokh, Konstantin A, Kaneva, Eketerina V, Svetlichnyi, Valery A, Kononova, Nadezda G, Shevchenko, Vyacheslav S, Rashchenko, Sergey V, Kokh, Alexander E
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 12.10.2021
• Subjects: Crystal growth; Electron transitions; High temperature; Lithium fluoride; Low temperature; Luminescence; Solid state; Synthesis; Unit cell
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d1dt02477a

The EuBO3–ScBO3 system was investigated by solid state synthesis and DSC methods. In this system, a new EuSc(BO3)2 compound was found. It crystallizes in the R3 space group with unit cell parameters of a = 4.8939(1) Å and c = 16.2663(5) Å. Whereas another compound in the system EuSc3(BO3)4 possesses two modifications: a low-temperature α-C2/c (a = 7.687(1) Å, b = 9.810(2) Å, c = 12.021(2) Å, and β = 105.379(4)°) and a high-temperature β-R32 (a = 9.7473(1) Å and c = 7.9205(2) Å). The α-EuSc3(BO3)4 crystal was grown with LiBO2–LiF flux, and β-EuSc3(BO3)4 was obtained by the solid state synthesis. All of the obtained crystals exhibited typical Eu3+ luminescence spectra with peaks at 589 nm, 596 nm, 615 nm, 657 nm and 689 nm, which corresponded to the 5D0 → 7FJ (J = 0, 1, 2 and 4) electron transitions. The strongest peak of luminescence was located at 615 nm and corresponded to the 5D0 → 7F0 transition.