Synthesis and structure of a new germanate fluoride

NaCa2GeO4F1

Lynn Schneemeyer, Lila Guterman, T. Siegrist, G. R. Kowach

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)

Abstract

We report the synthesis and structural characterization of a new oxoanion halide, NaCa2GeO4F. Crystal data: FW=235.74, Pnma (No. 62), orthorhombic, a=5.362(2), b=7.328(3), c=12.681(4) Å, V=498.3(3) Å3, Z=4, R(F)=0.044, Rw(F)=0.046 for 404 averaged reflections. Compositionally, this material can be viewed as the end-member of the hypothetical solid solution Ca2GeO4·(CaO)1-x·(NaF) x. However, in this unusual oxyfluoride, the fluoride ion orders and fully occupies one anion site. The structure consists of complicated condensed chains of six-coordinated cations centered by fluoride ions and linked by chains of isolated germanium oxide tetrahedra. The structure is best described in terms of the anion packing rather than the packing of cation-centered coordination polyhedra.

Original languageEnglish
Pages (from-to)33-38
Number of pages6
JournalJournal of Solid State Chemistry
Volume160
Issue number1
DOIs
StatePublished - 1 Jan 2001

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Fluorides
Anions
fluorides
Cations
Negative ions
Germanium oxides
Positive ions
germanium oxides
Ions
anions
cations
oxyfluorides
synthesis
polyhedrons
tetrahedrons
halides
Solid solutions
ions
solid solutions
Crystals

Cite this

Schneemeyer, Lynn ; Guterman, Lila ; Siegrist, T. ; Kowach, G. R. / Synthesis and structure of a new germanate fluoride : NaCa2GeO4F1. In: Journal of Solid State Chemistry. 2001 ; Vol. 160, No. 1. pp. 33-38.
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abstract = "We report the synthesis and structural characterization of a new oxoanion halide, NaCa2GeO4F. Crystal data: FW=235.74, Pnma (No. 62), orthorhombic, a=5.362(2), b=7.328(3), c=12.681(4) {\AA}, V=498.3(3) {\AA}3, Z=4, R(F)=0.044, Rw(F)=0.046 for 404 averaged reflections. Compositionally, this material can be viewed as the end-member of the hypothetical solid solution Ca2GeO4·(CaO)1-x·(NaF) x. However, in this unusual oxyfluoride, the fluoride ion orders and fully occupies one anion site. The structure consists of complicated condensed chains of six-coordinated cations centered by fluoride ions and linked by chains of isolated germanium oxide tetrahedra. The structure is best described in terms of the anion packing rather than the packing of cation-centered coordination polyhedra.",
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Synthesis and structure of a new germanate fluoride : NaCa2GeO4F1. / Schneemeyer, Lynn; Guterman, Lila; Siegrist, T.; Kowach, G. R.

In: Journal of Solid State Chemistry, Vol. 160, No. 1, 01.01.2001, p. 33-38.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - We report the synthesis and structural characterization of a new oxoanion halide, NaCa2GeO4F. Crystal data: FW=235.74, Pnma (No. 62), orthorhombic, a=5.362(2), b=7.328(3), c=12.681(4) Å, V=498.3(3) Å3, Z=4, R(F)=0.044, Rw(F)=0.046 for 404 averaged reflections. Compositionally, this material can be viewed as the end-member of the hypothetical solid solution Ca2GeO4·(CaO)1-x·(NaF) x. However, in this unusual oxyfluoride, the fluoride ion orders and fully occupies one anion site. The structure consists of complicated condensed chains of six-coordinated cations centered by fluoride ions and linked by chains of isolated germanium oxide tetrahedra. The structure is best described in terms of the anion packing rather than the packing of cation-centered coordination polyhedra.

AB - We report the synthesis and structural characterization of a new oxoanion halide, NaCa2GeO4F. Crystal data: FW=235.74, Pnma (No. 62), orthorhombic, a=5.362(2), b=7.328(3), c=12.681(4) Å, V=498.3(3) Å3, Z=4, R(F)=0.044, Rw(F)=0.046 for 404 averaged reflections. Compositionally, this material can be viewed as the end-member of the hypothetical solid solution Ca2GeO4·(CaO)1-x·(NaF) x. However, in this unusual oxyfluoride, the fluoride ion orders and fully occupies one anion site. The structure consists of complicated condensed chains of six-coordinated cations centered by fluoride ions and linked by chains of isolated germanium oxide tetrahedra. The structure is best described in terms of the anion packing rather than the packing of cation-centered coordination polyhedra.

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