Acta Crystallographica Section B

Structural Science

Volume 61, Part 4 (August 2005)

research papers

Acta Cryst. (2005). B61, 381-386 [ doi:10.1107/S0108768105013480 ]

Structure of strontium hydroxide octahydrate, Sr(OH)₂·8H₂O, at 20, 100 and 200 K from neutron diffraction

J. S. Ricci, R. C. Stevens, R. K. McMullan and W. T. Klooster

Abstract: The crystal structure of Sr(OH)₂·8H₂O has been determined at 20, 100 and 200 K from neutron diffraction data. The structure consists of double layers of H₂O and OH^- ions separated by Sr²⁺ along the c axis. The Sr²⁺ ions are eight-coordinated by water O atoms in a square antiprism configuration. Each H₂O molecule is engaged in three hydrogen bonds. The OH^- ions form chains of acceptor and donor bonds along the fourfold axis with O atoms engaged in four bonds with H₂O molecules, such that both non-equivalent O atoms have square-pyramidal environments of five H atoms and the overall bonding configurations of distorted octahedra.

Keywords: hydrogen bonding; neutron diffraction study; ionic hydroxides.


	Structure factor file (CIF format) (24.9 kbytes) Contains datablock SrOH_n200

	Structure factor file (CIF format) (24.7 kbytes) Contains datablock SrOH_n20

	Structure factor file (CIF format) (24.8 kbytes) Contains datablock SrOH_n100

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