Y. Zhang, X. Chen, Jinhua Liang
Feb 14, 2002
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0
Influential Citations
26
Citations
Journal
Journal of Alloys and Compounds
Abstract
Abstract The Na 2 O-rich portion of the ternary diagram Ln 2 O 3 –Na 2 O–B 2 O 3 (Ln=Y, Gd) has been investigated. A ternary phase of composition Na 3 Ln(BO 3 ) 2 has been found for Ln=Y, Gd. These compounds crystallize in the monoclinic space group P2 1 /c . The structure has been determined for the compound Na 3 Y(BO 3 ) 2 from powder X-ray diffraction. The structure can be described as being made up of isolated BO 3 triangles held together by the yttrium and sodium ions. The yttrium atoms have seven-fold coordination in a covalent BO 3 matrix. The sodium atoms have seven-, six- and four-fold coordination.