• Revisiting the Crystal Structure of Rhombohedral Lead Metaniobate 

      Olsen, Gerhard H.; Sørby, Magnus Helgerud; Hauback, Bjørn; Selbach, Sverre Magnus; Grande, Tor (Journal article; Peer reviewed, 2014)
      Lead metaniobate (PbNb2O6) can exist both as a stable rhombohedral and a metastable orthorhombic tungsten-bronze-type polymorph. While the orthorhombic is a well-known ferroelectric material, the rhombohedral polymorph ...
    • Structural Evolution of Ferroelectric and Ferroelastic Barium Sodium Niobate Tungsten Bronze 

      Aamlid, Solveig Stubmo; Selbach, Sverre Magnus; Grande, Tor (Peer reviewed; Journal article, 2020)
      The crystal structure of the ferroelastic and ferroelectric tungsten bronze Ba2NaNb5O15 (BNN) has been debated. Here, we re-examine the crystal structure of BNN by ambient powder X-ray diffraction combined with density ...
    • Structural Evolution of Ferroelectric and Ferroelastic Barium Sodium Niobate Tungsten Bronze 

      Aamlid, Solveig Stubmo; Selbach, Sverre Magnus; Grande, Tor (Peer reviewed; Journal article, 2020)
      The crystal structure of the ferroelastic and ferroelectric tungsten bronze Ba2NaNb5O15 (BNN) has been debated. Here, we re-examine the crystal structure of BNN by ambient powder X-ray diffraction combined with density ...