title: Synthetic analogues of Fe(ii)-Fe(iii) minerals containing a pentagonal 'Cairo' magnetic lattice.
abstract: Versiliaite and apuanite are two minerals containing Fe(2+) and Fe(3+) in a low-dimensional structure exhibiting chains of edge-linked FeO6 octahedra. The chemistry of these minerals has not been fully examined because of their rarity. We demonstrate that chemical synthesis of these minerals is possible to allow measurement of their magnetic properties and a more complete description of their structural features using neutron powder diffraction. We also show that chemical manipulation is possible to provide isostructural phases with different chemical compositions.
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK. c.greaves@bham.ac.uk.
authors.forename: J
authors.initials: J
authors.lastname: Cumby
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK. c.greaves@bham.ac.uk.
authors.forename: R D
authors.initials: RD
authors.lastname: Bayliss
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK. c.greaves@bham.ac.uk.
authors.forename: F J
authors.initials: FJ
authors.lastname: Berry
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK. c.greaves@bham.ac.uk.
authors.forename: C
authors.initials: C
authors.lastname: Greaves