title: Crystal structure of the new FeSe(1-x) superconductor.
abstract: The newly discovered superconductor FeSe(1-x) (x approximately 0.08, T(c)(onset) approximately 13.5 K at ambient pressure rising to 27 K at 1.48 GPa) exhibits a structural phase transition from tetragonal to orthorhombic below 70 K at ambient pressure-the crystal structure in the superconducting state shows remarkable similarities to that of the REFeAsO(1-x)F(x) (RE = rare earth) superconductors.
authors.affiliation: School of Chemistry, University of Edinburgh, Edinburgh, UKEH9 3JJ. serena.margadonna@ed.ac.uk
authors.forename: Serena
authors.initials: S
authors.lastname: Margadonna
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Takabayashi
authors.forename: Martin T
authors.initials: MT
authors.lastname: McDonald
authors.forename: Karolina
authors.initials: K
authors.lastname: Kasperkiewicz
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Mizuguchi
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Takano
authors.forename: Andrew N
authors.initials: AN
authors.lastname: Fitch
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Suard
authors.forename: Kosmas
authors.initials: K
authors.lastname: Prassides