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Fluorite‐like Li x Ln 5– x Mo 3 O 16.5–1.5 x F x (Ln = La, Pr, Nd) compounds isostructural with Nd 5 Mo 3 O 16
Author(s) -
Voronkova Valentina,
Kharitonova Elena,
Orlova Ekaterina,
Baldin Egor,
Gorshkov Nikolay,
Goffman Vladimir,
Chernyak Sergei
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17374
Subject(s) - fluorite , crystallography , solid solution , materials science , ternary operation , fluorine , analytical chemistry (journal) , chemistry , mineralogy , metallurgy , chromatography , computer science , programming language
Abstract Li x Ln 5– x Mo 3 O 16.5–1.5 x F x (0.8 ≤ x ≤ 1.4 (Ln = La), 0.4 ≤ x ≤ 1 (Ln = Pr), 0.6 ≤ x ≤ 1 (Ln = Nd)) solid solutions on the Ln 5 Mo 3 O 16 –LiLn 4 Mo 3 O 15 F joins of the Ln 2 O 3 –MoO 3 –LiF ternary systems, similar to the fluorite‐related cubic compound Nd 5 Mo 3 O 16 , have been prepared by solid‐state reactions. Substitutions of lithium on the rare‐earth site and fluorine on the oxygen site have been shown to lead to a reversible phase transition accompanied by an anomaly in permittivity and a jump in conductivity by one and half orders of magnitude. In a wet atmosphere, the Li x Ln 5– x Mo 3 O 16.5–1.5 x F x compounds may have proton conductivity.