title: Crystallographic and optical study of PbHfO3crystals.
abstract: The symmetry of the intermediate high-temperature phase of PbHfO3has been determined unambiguously to be orthorhombic using a combination of high-resolution X-ray diffraction and birefringence imaging microscopy measurements of crystal plates. While lattice parameter measurements as a function of temperature in the intermediate phase are consistent with either orthorhombic or tetragonal symmetry, domain orientations observed in birefringence imaging microscopy measurements utilizing the Metripol system are only consistent with orthorhombic symmetry with the unit cell in the rhombic orientation of the pseudocubic unit cell.
authors.affiliation: Department of Physics, University of Warwick , Coventry, West Midlands CV4 7AL, UK.
authors.forename: S
authors.identifier: https://orcid.org/0000-0002-9799-9943
authors.initials: S
authors.lastname: Huband
authors.affiliation: Department of Physics, University of Warwick, Coventry, West Midlands CV4 7AL, UK; Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
authors.forename: A M
authors.initials: AM
authors.lastname: Glazer
authors.affiliation: Institute of Physics, University of Silesia , ulica Uniwersytecka 4, Katowice, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Roleder
authors.affiliation: Institute of Applied Physics, Military University of Technology , ulica Kaliskiego 2, Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Majchrowski
authors.affiliation: Department of Physics, University of Warwick , Coventry, West Midlands CV4 7AL, UK.
authors.forename: P A
authors.initials: PA
authors.lastname: Thomas
keywords: Metripol; birefringence imaging microscopy; lead hafnate; phase transitions