Synthesis and characterization of lead and cadmium hexaborates doped with Cr3+

  • Tatyana N. Khamaganova Baikal Institute of Nature Management Siberian Branch of the Russian Academy of Sciences, 6 Sakhyanovoy str., Ulan-Ude 670047, Buryatia, Russian Federation
Keywords: Polycrystals of lead and cadmium borates, Cr3 ions, Solid-state reaction method, Solid solutions, X-ray phase analysis, DSC, IR spectroscopy


Borates doped with transition metals (Mn, Cu, Cr) exhibit a significant and long-lasting luminescence at room temperature, high power, and other outstanding characteristics. Therefore, the purpose of the study was to establish the possibility of the formation of borate materials containing chromium and the determination of their structure and thermal properties.

New phases of variable composition were synthesized in the PbCd2–xB6O12:xCr3+ system by heterovalent substitution of Cd2+ions with Cr3+ ions using solid-phase reactions at 640 °C. The phases were isolated in the concentration range 0 ≤ x ≤ 7.0 mol % and characterized by X-ray phase analysis (XRD), differential scanning calorimetry (DSC) and IR spectroscopy. According to XRD and IR spectra, the resulting borates crystallize in a monoclinic cell and are assigned to one structural type (space group P21/n, Z = 4).

The crystallographic characteristics of the new phases have been determined. The crystal lattice parameters and their volumes decrease monotonically, indicating the formation of a continuous series of substitutional solid solutions in the studied concentration range. According to the DSC results, the sample PbCd2–xB6O12: 0.03 Cr3+melts incongruently at 729 °C


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Author Biography

Tatyana N. Khamaganova, Baikal Institute of Nature Management Siberian Branch of the Russian Academy of Sciences, 6 Sakhyanovoy str., Ulan-Ude 670047, Buryatia, Russian Federation

Cand. Sci. (Chem.), Associate Professor, Senior Research Fellow,Laboratory of Oxide Systems, Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences (Ulan-Ude, Russian Federation)


Trunov V. K., Efremov V. A., Velikodny Yu. A. Crystal chemistry and properties of double molybdates and tungstates*. Leningrad: Science Publ.; 1986. 173 p. (In Russ.)

Urusov V. S. Solid solutions in the realm of minerals. Soros Educational Journal. 1996;11: 54–60. (In Russ., abstract in Eng.). Available at:

Kozhevnikova N. M., Mokhosoev M. V. Triple molybdates. Ulan-Ude: Buryat State University Publ.; 2000. 298 p. (In Russ.)

Ivanov-Shits A. K., Murin I. V. Solid state ionics: Vol. 1. St. Petersburg: St. Petersburg State University Publ.; 2001. 616 p. (In Russ.)

Petkov V. I. Complex phosphates formed by metal cations in oxidation states I and IV*. Russian Chemical Reviews. 2012;81(7): 606–637. (In Russ.).Available at:

Hao Y.-C., Xu X., Kong F., Song J.-L., Mao J.-G. PbCd2B6O12 and EuZnB5O10: syntheses, crystal structures and characterizations of two new mixed metal borates. CrystEngComm. 2014;16: 7689–7695.

Khamaganova T. m N. Synthesis and thermoluminescence properties of PbCd2–xMnxB6O12 solid solutions. Inorganic Materials. 2019;55(3): 290–294.

Khamaganova T. N. , Khumaeva T. G. , Perevalov A. V. Synthesis and thermoluminescence of borates Pb1–xEuxCd2B6O12. Russian Journal of Applied Chemistry. 2020;93(9): 1387–1391.

Khamaganova T. N. Synthesis and luminescence spectra of copper-containing monoclinic PbCd2B6O12- based materials. Inorganic Materials. 2023;59(4): 379–384.

Shao Q. Y., Ding H., Yao L.ьQ., Xu J. F., Liang C., Jiang J. Q. Photoluminescence properties of a ScBO3:Cr3+ phosphor and its applications for broadband near-infrared LEDs. RSC Advances. 2018;8: 12035–12042.

Fang M. H., Huang P.-Y., Bao Z., … Liu R.-S. Penetrating biological tissue using light-emitting diodes with a highly efficient near-infrared ScBO3: Cr3+ phosphor. Chemistry of Materials. 2020;32: 2166–2171.

Malysa B., Meijerink A., Jüstel T. Temperature dependent photoluminescence of Cr3+ doped Sr8MgLa(PO4)7. Optical Materials. 2018;85: 341–348.

Du J. R., Poelman D. Identifying near-infrared persistent luminescence in Cr3+-doped magnesium gallogermanates featuring afterglow emission at extremely low temperature. Advanced Optical Materials. 2020;8: 1901848.

Jia Z. W., Yuan C. X., Liu Y. F., … Jiang J. Strategies to approach high performance in Cr3+-doped phosphors for high-power NIR-LED light sources. Light: Science & Applications. 2020;9(1): 86.

Bruker AXS TOPAS V4: General profile and structure analysis software for powder diffraction data. User’s Manual. Karlsruhe, Germany: Bruker AXS; 2008. 68 p. Available at:

Weir C. E., Schroeder R. A. Infrared spectra of the crystalline inorganic borates. Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry. 1964;68A (5): 465–487.

Egorysheva A. V., Burkov V. I., Kargin Yu. F., Plotnichenko V. G., Koltashev V. V. Vibrational spectra of crystals of bismuth borates. Crystallography Reports. 2005; 50(1): 127–136.

Pir P. V., Shabanov E. V., Dotsenko V. P. Synthesis and IR spectroscopic study of strontium borates. Vestnik Odesskogo natsional’nogo universiteta [Bulletin of Odessa National University]. 2005;10(1): 21–27. (In Russ., abstract in Eng.). Available at:

Dobretsova E. A., Boldyrev K. N., Chernyshev V. A., Petrov V. P., Maltsev V. V., Leonyuk N. I. Infrared spectroscopy of europium borates EuM3(BO3)4 (M = Al, Cr, Fe, Ga) with a huntite mineral type of structure. Bulletin of the Russian Academy of Sciences: Physics. 2017;81(5): 546–550.

Shmurak S. Z., Kedrov V. V., Kiselev A. P., Fursova T. N., Zver’kova I. I.. Structural and spectral characteristics of La0.99–xYxEu0.01BO3 orthoborates. Physics of the Solid State. 2022;64(8): 961–972.

Shannon R. D. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica Section A. 1976;A32: 751–767.

How to Cite
Khamaganova, T. N. (2024). Synthesis and characterization of lead and cadmium hexaborates doped with Cr3+. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 26(2), 321-326.
Original articles