Phase Diagrams of Lead Difluoride Systems with Rare-Earth Fluorides

Phase equilibria in the PbF 2 –RF 3 (R = La–Nd, Sm, Gd–Lu, Y, and Sc) systems were studied by X-ray powder diffraction in samples annealed under a fluorinating atmosphere and then quenched and by differential thermal analysis (DTA) under an inert atmosphere using unlidded thin-walled graphite crucib...

Full description

Saved in:
Bibliographic Details
Published inRussian journal of inorganic chemistry Vol. 66; no. 2; pp. 245 - 252
Main Author Fedorov, P. P.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.02.2021
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Crucibles
Differential thermal analysis
Difluorides
Fluorides
Fluorite
Gadolinium
Inert atmospheres
Inorganic Chemistry
Lanthanum fluorides
Phase diagrams
Phase equilibria
Physicochemical Analysis of Inorganic Systems
Rare earth elements
Solid solutions
X ray powder diffraction
X-ray powder diffraction analysis
phase diagrams
lead fluoride
solid solutions
rare-earth fluorides
heterovalent isomorphism
thermal analysis
Online AccessGet full text

Cover

More Information
Summary:Phase equilibria in the PbF 2 –RF 3 (R = La–Nd, Sm, Gd–Lu, Y, and Sc) systems were studied by X-ray powder diffraction in samples annealed under a fluorinating atmosphere and then quenched and by differential thermal analysis (DTA) under an inert atmosphere using unlidded thin-walled graphite crucibles. Stability areas were elucidated for Pb 1 – x R x F 2 + x fluorite solid solutions, for R 1 – y Pb y F 3 – y solid solutions having the tysonite LaF 3 structure, and for ordered phases of idealized composition Pb 4 R 3 F 17 having trigonally distorted cubic unit cells. The topological evolution of the systems in response to the changing rare-earth ionic radius was considered.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023621020078