title: Structural behaviour of synthetic Co2SiO4 at low temperatures.
abstract: Synthetic Co2SiO4 has an olivine structure with isolated SiO4 groups (space group Pnma) and shows magnetic ordering below 50 K. Single-crystal neutron diffraction was applied to determine precise crystal structure parameters at low temperatures. No structural phase transition was revealed in the temperature range 2.5-300 K. Lattice parameters were determined by high-resolution X-ray powder diffraction between 15 and 300 K. There is a clear evidence of an anomalous thermal expansion related to the magnetic phase transition which can be attributed to magnetostriction.
authors.affiliation: Institut für Kristallographie, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen, D-52066 Aachen, Germany. andrew.sazonov@frm2.tum.de
authors.forename: Andrew
authors.initials: A
authors.lastname: Sazonov
authors.forename: Martin
authors.initials: M
authors.lastname: Meven
authors.forename: Vladimir
authors.initials: V
authors.lastname: Hutanu
authors.forename: Volker
authors.initials: V
authors.lastname: Kaiser
authors.forename: Gernot
authors.initials: G
authors.lastname: Heger
authors.forename: Dmytro
authors.initials: D
authors.lastname: Trots
authors.forename: Michael
authors.initials: M
authors.lastname: Merz