Structure of two new borates YCa{sub 3}(AlO){sub 3}(BO{sub 3}){sub 4} and YCa{sub 3}(GaO){sub 3}(BO{sub 3}){sub 4}

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2005.11.004· OSTI ID:20784879

Yi, Yu ^[1]; Wu, Q S ^[1]; Li, R K ^[2]

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1. Department of Chemistry, Tongji University, Shanghai 200092 (China)
2. Beijing Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080 (China)

By replacing Mn in YCa{sub 3}(MnO){sub 3}(BO{sub 3}){sub 4} with trivalent Al and Ga, two new borates with the compositions of YCa{sub 3}(MO){sub 3}(BO{sub 3}){sub 4} (M=Al, Ga) were prepared by solid-state reaction. Structure refinements from X-ray powder diffraction data revealed that both of them are isostructural to gaudefroyite with a hexagonal space group P6{sub 3}/m. Cell parameters of a=10.38775(13)A, c=5.69198(10)A for the Al-containing compound and a=10.5167(3)A, c=5.8146(2)A for the Ga analog were obtained from the refinements. The structure is constituted of AlO{sub 6} or GaO{sub 6} octahedral chains interconnected by BO{sub 3} groups in the ab plane to form a Kagome-type lattice, leaving trigonal and apatite-like tunnels. It is found that most rare-earth and Cr, Mn ions can be substituted into the Y{sup 3+} and M{sup 3+} sites, respectively, and the preference of rare-earth ions to locate in the trigonal tunnel is correlated to the sizes of the M{sup 3+} ions.

• OSTI ID: 20784879
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 179; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BORATES
CALCIUM COMPOUNDS
GALLIUM OXIDES
HEXAGONAL LATTICES
MANGANESE IONS
MANGANESE OXIDES
RARE EARTH COMPOUNDS
SPACE GROUPS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM IONS