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

Artem B Kuznetsov; Konstantin A Kokh; Eketerina V Kaneva; Valery A Svetlichnyi; Nadezda G Kononova; Vyacheslav S Shevchenko; Sergey V Rashchenko; Alexander E Kokh

doi:10.1039/d1dt02477a

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

Dalton Trans. 2021 Oct 12;50(39):13894-13901. doi: 10.1039/d1dt02477a.

Authors

Artem B Kuznetsov¹, Konstantin A Kokh^{1

2

3}, Eketerina V Kaneva⁴, Valery A Svetlichnyi⁵, Nadezda G Kononova¹, Vyacheslav S Shevchenko¹, Sergey V Rashchenko^{1

2}, Alexander E Kokh¹

Affiliations

¹ Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Russia. ku.artemy@igm.nsc.ru.
² Novosibirsk State University, Novosibirsk 630090, Russia.
³ Kemerovo State University, Kemerovo, 650000, Russia.
⁴ Vinogradov Institute of geochemistry SB RAS, Irkutsk 664033, Russia.
⁵ Tomsk State University, Tomsk 634050, Russia.

PMID: 34528048
DOI: 10.1039/d1dt02477a

Abstract

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 R3̄ 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 → ⁷F_J (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.