Synthesis of LiTiPO5 and LiTiAsO5 with the α-Fe2PO5 Structure

A. Robertson, J. G. Fletcher, J. M.S. Skakle, A. R. West

Research output: Contribution to journalArticle

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Abstract

The new phases LiTiPO5 and LiTiAsO5 have been synthesized by solid state reaction. They are essentially isostructural with α-Fe2PO5, as confirmed by X-ray Rietveld refinement. The structures are built of chains of edge-sharing LiO6 octahedra cross-linked by chains of alternate corner-sharing PO4 tetrahedra and TiO6 octahedra (each of which shares common faces with two LiO6 octahedra). Unit cell dimensions: LiTiPO5, a = 7.4000(5) Å, b = 6.3752(3) Å, c = 7.2347(4) Å; LiTiAsO5, a = 7.5257(5) Å, b = 6.5786(4) Å, c = 7.4524(5) Å. Space group: Pnma. The phases melt incongruently at ∼1080°C and exhibit very low electrical conductivities, (5-10) × 10-6 S cm-1 at 400°C with activation energy ∼1 eV. Subsolidus phase diagrams for the systems Li2O-TiO2-P2O5/As2O5 are presented.

Original languageEnglish
Pages (from-to)53-59
Number of pages7
JournalJournal of Solid State Chemistry
Volume109
Issue number1
DOIs
Publication statusPublished - Mar 1994

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phosphorus pentoxide
Rietveld refinement
Solid state reactions
Phase diagrams
Activation energy
X rays
synthesis
tetrahedrons
phase diagrams
activation energy
solid state
electrical resistivity
cells
x rays
Electric Conductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Synthesis of LiTiPO5 and LiTiAsO5 with the α-Fe2PO5 Structure. / Robertson, A.; Fletcher, J. G.; Skakle, J. M.S.; West, A. R.

In: Journal of Solid State Chemistry, Vol. 109, No. 1, 03.1994, p. 53-59.

Research output: Contribution to journalArticle

Robertson, A. ; Fletcher, J. G. ; Skakle, J. M.S. ; West, A. R. / Synthesis of LiTiPO5 and LiTiAsO5 with the α-Fe2PO5 Structure. In: Journal of Solid State Chemistry. 1994 ; Vol. 109, No. 1. pp. 53-59.
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N2 - The new phases LiTiPO5 and LiTiAsO5 have been synthesized by solid state reaction. They are essentially isostructural with α-Fe2PO5, as confirmed by X-ray Rietveld refinement. The structures are built of chains of edge-sharing LiO6 octahedra cross-linked by chains of alternate corner-sharing PO4 tetrahedra and TiO6 octahedra (each of which shares common faces with two LiO6 octahedra). Unit cell dimensions: LiTiPO5, a = 7.4000(5) Å, b = 6.3752(3) Å, c = 7.2347(4) Å; LiTiAsO5, a = 7.5257(5) Å, b = 6.5786(4) Å, c = 7.4524(5) Å. Space group: Pnma. The phases melt incongruently at ∼1080°C and exhibit very low electrical conductivities, (5-10) × 10-6 S cm-1 at 400°C with activation energy ∼1 eV. Subsolidus phase diagrams for the systems Li2O-TiO2-P2O5/As2O5 are presented.

AB - The new phases LiTiPO5 and LiTiAsO5 have been synthesized by solid state reaction. They are essentially isostructural with α-Fe2PO5, as confirmed by X-ray Rietveld refinement. The structures are built of chains of edge-sharing LiO6 octahedra cross-linked by chains of alternate corner-sharing PO4 tetrahedra and TiO6 octahedra (each of which shares common faces with two LiO6 octahedra). Unit cell dimensions: LiTiPO5, a = 7.4000(5) Å, b = 6.3752(3) Å, c = 7.2347(4) Å; LiTiAsO5, a = 7.5257(5) Å, b = 6.5786(4) Å, c = 7.4524(5) Å. Space group: Pnma. The phases melt incongruently at ∼1080°C and exhibit very low electrical conductivities, (5-10) × 10-6 S cm-1 at 400°C with activation energy ∼1 eV. Subsolidus phase diagrams for the systems Li2O-TiO2-P2O5/As2O5 are presented.

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