Crystal structure of the new magnetoplumbite related compound in the system SrO Al_2_O_3_-MgO

Iyi N, Göbbels M (1996)

Publication Language: English

Publication Type: Journal article

Publication year: 1996

Journal

Journal of Solid State Chemistry Elsevier

Book Volume: 122

Pages Range: 46-52

Abstract

A new phase in the system SrO–Al₂O₃–MgO, which was analyzed by EPMA as Sr₂MgAl₂₂O₃₆, was recently found. It is located in the middle of the join connecting strontium hexaaluminate (SrAl₁₂O₁₉) of magnetoplumbite structure and strontium magnesium hexaaluminate (SrMgAl₁₀O₁₇) of β-alumina structure. The crystals were grown by the floating zone method and its crystal structure was analyzed by using the single crystal X-ray was analyzed by using the single crystal X-ray diffraction method. The space group wasPm2 with lattice parametersa= 5.583 Å andc= 22.225 Å. The observedc-axis length is intermediate between those of SrAl₁₂O₁₉(c= 22.00 Å) and SrMgAl₁₀O₁₇(c= 22.399 Å). The structure refinement result has shown that it had the alternate stacking of the conduction layers of magnetoplumbite-type (SrAlO₃) and β-alumina-type (SrO) separated by a spinel block ((Al, Mg)₁₁O₁₆). This is the first time that such a “mixed-layer” structure of β-alumina and magnetoplumbite is found to exist in the hexaaluminates containing one species of large cation.

Authors with CRIS profile

Matthias Göbbels Lehrstuhl für Mineralogie

Involved external institutions

National Institute for Materials Science

Japan (JP)

How to cite

APA:

Iyi, N., & Göbbels, M. (1996). Crystal structure of the new magnetoplumbite related compound in the system SrO Al_2_O_3_-MgO. Journal of Solid State Chemistry, 122, 46-52.

MLA:

Iyi, Nobou, and Matthias Göbbels. "Crystal structure of the new magnetoplumbite related compound in the system SrO Al_2_O_3_-MgO." Journal of Solid State Chemistry 122 (1996): 46-52.

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