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The matlockite-type praseodymium(III) oxide bromide PrOBr.

ABSTRACT: The crystal structure of the praseodymium(III) oxide bromide, PrOBr, can be best described with layers of agglomerated square anti-prisms [PrO(4)Br(4)](9-). These slabs are stacked along the c axis and linked via two different secondary contacts between Pr(3+) and Br(-). The Pr(3+) cations occupy the Wyckoff site 2c with 4mm symmetry and carry four O(2-) anions as well as four primary Br(-) anions, yielding a coordination number of 8. While the Br(-) anions exhibit the same site symmetry as the Pr(3+) cations, the oxide anions are located at the Wyckoff position 2a with site symmetry [Formula: see text]m2 and have four Pr(3+) cations as neighbours, defining a tetra-hedron.

SUBMITTER: Talmon-Gros P

PROVIDER: S-EPMC3238581 | biostudies-literature | 2011 Dec

REPOSITORIES: biostudies-literature

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The matlockite-type praseodymium(III) oxide bromide PrOBr.

Talmon-Gros Pia P Schurz Christian M CM Schleid Thomas T

Acta crystallographica. Section E, Structure reports online 20111123 Pt 12

The crystal structure of the praseodymium(III) oxide bromide, PrOBr, can be best described with layers of agglomerated square anti-prisms [PrO(4)Br(4)](9-). These slabs are stacked along the c axis and linked via two different secondary contacts between Pr(3+) and Br(-). The Pr(3+) cations occupy the Wyckoff site 2c with 4mm symmetry and carry four O(2-) anions as well as four primary Br(-) anions, yielding a coordination number of 8. While the Br(-) anions exhibit the same site symmetry as the ...[more]

PMID: 22199472

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