Browsing by author "Brand, Helen E. A."
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Beyond the Ionic Radii: A Multifaceted Approach to Understand Differences between the Structures of LnNbO4 and LnTaO4 Fergusonites
Mullens, Bryce; Saura-Múzquiz, Matilde; Marlton, Frederick; Avdeev, Maxim; Brand, Helen E. A.; Mondal, S.; Vaitheeswaran, G.; Kennedy, Brendan JamesPublished 2023Synchrotron X-ray powder diffraction methods have been used to obtain accurate structures of the lanthanoid tantalates, LnTaO4, at room temperature. Three different structures are observed, depending on the size of the Ln ...Open AccessArticle -
Long-Range A-Site Cation Disorder in NaA(MO4)2 (M = Mo, W) Double Scheelite Oxides
Mullens, Bryce; Nicholas, Maria; Marlton, Frederick; Brand, Helen E. A.; Gu, Qinfen; Maynard-Casely, Helen Elizabeth; Kennedy, Brendan JamesPublished 2023Synchrotron X-ray and neutron powder diffraction methods have been used to obtain accurate long-range average structures of some double scheelite compounds of the type NaA(BO4)2 (A = La, Pr, Nd, Sm, Lu, and Bi; B = Mo, W) ...Open AccessArticle -
Structural And Magnetic Properties Of Some Vacancy Ordered Osmium Halide Perovskites
Saura-Múzquiz, Matilde; Avdeev, Maxim; Brand, Helen E. A.; Kennedy, Brendan JamesPublished 22The structures and magnetic properties of the Os4+ (5d4) halides K2OsCl6, K2OsBr6, Na2OsBr6 and Na2OsBr6.6H2O are described. K2OsCl6 and K2OsBr6 have a cubic vacancy-ordered double perovskites structure but undergo different ...Open AccessArticle -
Structure and electronic properties of a mu-oxo ruthenium bromide
Saura-Múzquiz, Matilde; Mullens, Bryce; Brand, Helen E. A.; Kennedy, Brendan JamesPublished 2022The crystal structure of potassium μ-oxo-bis[pentabromoruthenate] K4Ru2OBr10, determined from synchrotron X-ray powder diffraction, is described. Each Ru atom is surrounded by five Br atoms and one O atom. Magnetic ...Open AccessArticle -
Understanding the re-entrant phase transition in a non-magnetic scheelite
Kennedy, Brendan James; Saura-Múzquiz, Matilde; Marlton, Frederick; Mullens, Bryce; Manjón-Sanz, Alicia María; Neuefeind, Joerg C.; Everett, Michelle; Brand, Helen E. A.; Mondald, S.; Vaitheeswaran, G.Published 2022The stereochemical activity of lone pair electrons plays a central role in determining the structural and electronic properties of both chemically simple materials such as H2O, as well as more complex condensed phases such ...Open AccessArticle
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