Interactions of yttrium and lanthanum fluorides with other fluorides

Федоров, П. П.; Чернова, Е. В.

doi:10.1016/j.jfluchem.2022.110031

Cited by 4 publications

(1 citation statement)

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“…The phase diagram of CaF 2 -YF 3 systems has been carefully studied [25][26][27][28][29], see Fig. 1 [30,31]. A fluorite solid solution Ca 1−x Y x F 2+x (phase F ), a series of ordered low-temperature fluorite-like phases, and a high-temperature non-stoichiometric phase with a tysonite structure (phase T ) are formed in the system.…”

Section: Introductionmentioning

confidence: 99%

Features of Ca1-xYxF2+x solid solution heat capacity behavior: diffuse phase transition

Alexandrov¹,

Резаева²,

Konyushkin³

et al. 2023

Nanosystems: Phys. Chem. Math.

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A series of single crystals of a Ca 1−x Y x F 2+x solid solution with a fluorite structure containing 1-19 mol.% YF 3 (x =0.01-0.19) has been grown. Thermal analyzer STA 449 F3 Jupiter in DSC mode recorded the temperature dependences of the heat capacity C p (T) in the temperature range from the room temperature to 1300 • C. A diffuse phase transition in the solid state for concentrations x =0.01-0.03 is fixed as an anomaly on the C p (T) curves with a maximum at 1150 ± 50 • C. With an increase in the content of YF 3 (x =0.05-0.19), a very wide structured peak is recorded in the range of 650-1100 • C. The heat capacity anomaly is associated with the reversible rearrangement of defect nanoclusters, which affects the change in the anion sublattice. KEYWORDS CaF 2 -YF 3 phase diagram, inorganic fluorides, fluorite, diffuse phase transition, solid solution, heterovalent isomorphism, defect clusters.

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