Issue 2, 2002

Abstract

Lithium magnesium fluoride sulfate, LiMgFSO4, has been prepared by reaction of MgSO4·H2O, Li2CO3 and NH4F at 450–500 °C. It crystallizes in space group P[1 with combining macron] of the triclinic system, with Z = 2 and a = 5.1623(7), b = 5.388(1), c = 7.073(1) Å, α = 106.68(1), β = 107.40(1) and γ = 97.50(1)°. The structure is built up from single chains of corner-sharing MgO4F2 octahedra running parallel to the c axis, cross linked via vertex-sharing SO4 tetrahedra, so that each tetrahedron links three different chains. Li resides within the cavities defined by the framework, wherein it is disordered between two half-occupied sites. This structure is isotypic with that of all members of the amblygonite (LiAlFPO4)–montebrasite (LiAlOHPO4) series, and that of tavorite (LiFeOHPO4). It is topologically identical to the titanite (CaTiOSiO4) and kieserite (MgSO4·H2O) structures. The framework structure of LiMgFSO4 facilitates lithium ion conduction [σ (520 °C) = 1.5 × 10-3 S cm−1; Ea = 0.94 eV].

Graphical abstract: Synthesis, crystal structure and lithium ion conductivity of LiMgFSO4

Supplementary files

Article information

Article type
Paper
Submitted
11 Sep 2001
Accepted
16 Nov 2001
First published
05 Dec 2001

J. Mater. Chem., 2002,12, 374-377

Synthesis, crystal structure and lithium ion conductivity of LiMgFSO4

L. Sebastian, J. Gopalakrishnan and Y. Piffard, J. Mater. Chem., 2002, 12, 374 DOI: 10.1039/B108289M

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements