A sub(5)RE sub(4)X[TO sub(4)] sub(4) crystal growth: Fluoride flux synthesis of Na sub(5)Ln sub(4)F[GeO sub(4)] sub(4) (Ln=Pr, Nd), the first quaternary germanate oxyfluorides

Crystals of Na sub(5)Pr sub(4)F[GeO sub(4)] sub(4) and Na sub(5)Nd sub(4)F[GeO sub(4)] sub(4) were synthesized using a eutectic sodium fluoride, sodium chloride flux. Both compounds crystallize in the tetragonal space group I-4 with lattice parameters of a=12.1173(4) Aa and c=5.6795(2) Aa (Pr) and o...

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Bibliographic Details
Published in:Journal of solid state chemistry 2016-07, Vol.239, p.200-203
Main Authors: Latshaw, Allison M, Wilkins, Branford O, Morrison, Gregory, Smith, Mark D, Loye, Hans-Conrad zur
Format: Article
Language:English
Subjects:
Corners
Crystal growth
Flux
Lattice parameters
Oxyfluorides
Polyhedrons
Sodium fluoride
Three dimensional
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Summary:Crystals of Na sub(5)Pr sub(4)F[GeO sub(4)] sub(4) and Na sub(5)Nd sub(4)F[GeO sub(4)] sub(4) were synthesized using a eutectic sodium fluoride, sodium chloride flux. Both compounds crystallize in the tetragonal space group I-4 with lattice parameters of a=12.1173(4) Aa and c=5.6795(2) Aa (Pr) and of a=12.0642(17) Aa and c=5.6674(11) Aa (Nd). The structure of the reported compounds is three-dimensional with face and corner sharing lanthanide polyhedra which edge and corner share with isolated germanium tetrahedra. These novel compositions represent the first example of quaternary germanium containing oxyfluorides.
ISSN:0022-4596
DOI:10.1016/j.jssc.2016.04.038