Crystal structure of hexagonal SrAl{sub 2}O{sub 4} at 1073K

Journal Article · Thu Sep 15 04:00:00 EDT 2005 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2005.06.012· OSTI ID:20729077

Fukuda, Koichiro ^[1]; Fukushima, Kentaro ^[1]

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1. Department of Environmental and Materials Engineering, Nagoya Institute of Technology, Nagoya 466-8555 (Japan)

The crystal structure of SrAl{sub 2}O{sub 4} at 1073K was determined from conventional X-ray powder diffraction data using direct methods, and it was further refined by the Rietveld method. The structure was hexagonal (space group P6{sub 3}, Z=6) with a=0.89260(3)nm, c=0.84985(2)nm and V=0.58639(3)nm{sup 3}. Final reliability indices were R{sub wp}=7.87%, R{sub p}=5.87% and R{sub B}=4.19%. The [AlO{sub 4}] tetrahedra are linked to form trigonally distorted rings and they are joined in layers. These layers are stacked with a two-layer repeat and connected by the tetrahedral apices. All of the Sr atoms occupy the centers of the rings when viewed along the c-axis. The structure is described as a stuffed derivative of tridymite.

• OSTI ID: 20729077
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 178; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALUMINATES
HEXAGONAL LATTICES
LAYERS
SPACE GROUPS
STRONTIUM COMPOUNDS
X-RAY DIFFRACTION