Structure and luminescence of the La sub 1 minus x Gd sub x F sub 3 system

Journal Article · Mon Dec 31 23:00:00 EST 1990 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2085562· OSTI ID:6009930

Brixner, L H; Crawford, M K; Hyatt, G ^[1]; Carnall, W T ^[2]; Blasse, G ^[3]

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1. E.I. du Pont de Nemours and Co., Experimental Station, Central Research and Development Dept., Wilmington, DE (US)
2. Argonne National Lab., Chemistry Div., Argonne, IL (US)
3. Debye Research Inst., Univ. of Utrecht, 3508 Utrecht (NL)

The trifluorides of La and Gd crystallize in different structures: LaF{sub 3} is of the hexagonal tysonite (P{bar 3}1c) type, while GdF{sub 3} crystallizes in orthorhombic (Pnma) symmetry. Solid solutions of the type La{sub 1 {minus}x}Gd{sub x}F{sub 3} exist in the hexagonal structure to x = 0.5 and convert to the orthorhombic phase at x = 0.75. In this paper, lattice parameters are reported and the x-ray excited luminescence of Gd{sup 3+} in these compounds is discussed with particular emphasis on the Gd{sup 3+} site symmetry difference C{sub 2} in LaF{sub 3} and C{sub s} in GdF{sub 3}.

• OSTI ID: 6009930
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 138:1; ISSN JESOA; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLIZATION
DIFFRACTION
DISPERSIONS
FLUORIDES
FLUORINE COMPOUNDS
GADOLINIUM COMPOUNDS
GADOLINIUM FLUORIDES
HALIDES
HALOGEN COMPOUNDS
HEXAGONAL LATTICES
LANTHANUM COMPOUNDS
LANTHANUM FLUORIDES
MIXTURES
ORTHORHOMBIC LATTICES
PHASE STUDIES
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SCATTERING
SOLID SOLUTIONS
SOLUTIONS
STRUCTURAL CHEMICAL ANALYSIS
X-RAY DIFFRACTION