Dependences of the density of M 1−x R x F2 + x and R 1−y M y F3−y single crystals (M = Ca, Sr, Ba, Cd, Pb; R means rare earth elements) on composition

Autor:	Z. I. Zhmurova, E. A. Krivandina, N. I. Sorokin
Rok vydání:	2013
Předmět:	Materials science Bridgman method Inorganic chemistry Rare earth Analytical chemistry General Chemistry Composition (combinatorics) Condensed Matter Physics Fluorite Vacancy defect Fast ion conductor Ionic conductivity General Materials Science Single crystal
Zdroj:	Crystallography Reports. 58:948-952
ISSN:	1562-689X 1063-7745
DOI:	10.1134/s1063774513060217
Popis:	The density of single crystals of nonstoichiometric phases Ba1 − xLaxF2 + x (0 ≤ x ≤ 0.5) and Sr0.8La0.2 − xLuxF2.2 (0 ≤ x ≤ 0.2) with the fluorite (CaF2) structure type and R1 − ySryF3 − y (R = Pr, Nd; 0 ≤ y ≤ 0.15) with the tysonite (LaF3) structure type has been measured. Single crystals were grown from a melt by the Bridgman method. The measured concentration dependences of single crystal density are linear. The interstitial and vacancy models of defect formation in the fluorite and tysonite phases, respectively, are confirmed. To implement the composition control of single crystals of superionic conductors M1 − xRxF2 + x and R1 − yMyF3 − y in practice, calibration graphs of X-ray density in the MF2-RF3 systems (M = Ca, Sr, Ba, Cd, Pb; R = La-Lu, Y) are plotted.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a9eb63320b80659c648dc0af5d325c50 https://doi.org/10.1134/s1063774513060217 Zobrazit plný text záznamu Full text from SpringerLink