Synthesis of LiTiPO5 and LiTiAsO5 with the α-Fe2PO5 Structure

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

doi:10.1006/jssc.1994.1070

Synthesis of LiTiPO₅ and LiTiAsO₅ with the α-Fe₂PO₅ Structure

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

University of Aberdeen

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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 language	English
Pages (from-to)	53-59
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	109
Issue number	1
DOIs	https://doi.org/10.1006/jssc.1994.1070
Publication status	Published - Mar 1994

Keywords

IONIC-CONDUCTIVITY
PHOSPHATE
TITANIUM
SYSTEMS

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@article{2b5e34e95d9e44ae9e90d32d238170db,

title = "Synthesis of LiTiPO5 and LiTiAsO5 with the α-Fe2PO5 Structure",

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) {\AA}, b = 6.3752(3) {\AA}, c = 7.2347(4) {\AA}; LiTiAsO5, a = 7.5257(5) {\AA}, b = 6.5786(4) {\AA}, c = 7.4524(5) {\AA}. 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.",

keywords = "IONIC-CONDUCTIVITY, PHOSPHATE, TITANIUM, SYSTEMS",

author = "A. Robertson and Fletcher, {J. G.} and Skakle, {J. M.S.} and West, {A. R.}",

year = "1994",

month = mar,

doi = "10.1006/jssc.1994.1070",

language = "English",

volume = "109",

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AU - Robertson, A.

AU - Fletcher, J. G.

AU - Skakle, J. M.S.

AU - West, A. R.

PY - 1994/3

Y1 - 1994/3

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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JO - Journal of Solid State Chemistry

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Synthesis of LiTiPO₅ and LiTiAsO₅ with the α-Fe₂PO₅ Structure

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Keywords

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