Nd3+ and Pr3+ doped anti-zeolite matrix-LiBa12(BO3)7F4: Crystal structures, luminescence properties

• Published in: Materials chemistry and physics Vol. 247; p. 122612
• Main Authors: Simonova, E.A., Kuznetsov, A.B., Svetlichnyi, V.A., Kononova, N.G., Shevchenko, V.S., Nigmatulina, E.N., Kolesnichenko, M.V., Kokh, K.A., Rashchenko, S.V., Kokh, A.E.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.06.2020; Elsevier BV
• Subjects: Absorption spectra; Barium fluorides; Crystal structure; Crystals; Cubes; Dichroism; High temperature; Luminescence; Luminophores; Neodymium; Optical properties; Rare earth compounds; Single crystals; Solid solutions; Zeolites; Rare earth compounds; Luminophores; Luminescence; Crystal structure
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2019.122612

The LiBa12(BO3)7F4 crystals doped Nd3+ and Pr3+ were grown from high-temperature solution melts, using the TSSG method. All the samples have the wide absorption band in the visible range of 350–650 nm related to the dichroism, which is typical for other colored “antizeolites”. Strong radiation bands are associated with well known electronic transitions of Pr3+ (3P0 → 3H6 at 630 nm, 3P0 → 2F2 at 670 nm) and Nd3+ (4F3/2 → 4I9/2 at 875 nm, 4F3/2 → 4I11/2 at 1054 nm). In addition crystals of Nd-doped barium fluoride borate solid solutions NdxBa12(BO3)8-xF6x were grown from high temperature solution. Using X-ray single-crystal diffraction, the structure was solved and refined in I4/mcm space group that are similar to other colored “antizeolites” built with the positively charged framework of [Ba12(BO3)6]6+ cation pattern which contains channels built of alternating barium cubes and anticubes. According to the structure refinement of NdxBa12(BO3)8−xF6x, cube channel segments are populated mainly by [F4]4– and [NdF4]– clusters, whereas anticube ones – by (BO3)3– anions. [Display omitted] •NdxBa12(BO3)8-xF6x crystals were grown from high temperature solution.•NdxBa12(BO3)8-xF6x structure was solved by single crystal X-ray analysis.•Luminescent and absorption spectra for NdxBa12(BO3)8-xF6x and LiBa12(BO3)7F4: Nd3+/Pr3+ were measured.