Lead Lanthanide Oxyfluorides in a Glasslike Matrix

V. A. Aseev^a, V. V. Golubkov^b, E. V. Kolobkova^c, and N. V. Nikonorov^a

^aSt. Petersburg State University of Information Technologies, Mechanics, and Optics,
Kronverkskii pr. 49, St. Petersburg, 197101 Russia

^bGrebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
nab. Makarova 2, St. Petersburg, 199034 Russia

^cSt. Petersburg State Institute of Technology (TU), Moskovskii pr. 26, St. Petersburg, 190013 Russia

e-mail: kolobok106@rambler.ru

Received January 12, 2011

Abstract—The crystalline phases formed upon thermal treatment of glasses of composition 18PbF₂ · 30SiO₂ ·
5ZnF₂ · 29CdF₂ · 15AlO_3/2 · (2–5.5)Ln(Y)F₃ (mol%) at the crystallization onset temperature have been investi-
gated. The possibility of obtaining nanosized crystals of a new class of PbLnOF₃ compounds, in which Ln are
lanthanides from Ce to Lu, with a fluorite structure (cubic crystal system, face-centered, space group Fm3m) in
a glasslike matrix has been demonstrated. The unit cell size depends on the lanthanide type (ionic radius).

Keywords: 18PbF₂ ·30SiO₂ · 5ZnF₂ · 29CdF₂ · 15AlO_3/2 · (2–5.5)Ln(Y)F₃ glass crystallization, PbLnOF₃
nanocrystals

DOI: 10.1134/S1087659612020010

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