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Crystal chemistry of the new rare-earth sodium borates Na/sub 3/Ln(BO/sub 3/)/sub 2/(Ln = La, Nd)

Journal Article · · J. Solid State Chem.; (United States)
The ternary borate systems Na/sub 2/O-Ln/sub 2/O/sub 3/-B/sub 2/O/sub 3/ (Ln = La, Nd) have been investigated in view of obtaining high-neodymium-concentration materials with weak concentration quenching. A ternary phase of composition Na/sub 3/Ln(BO/sub 3/)/sub 2/ (Ln = La, Nd) has been found. It crystallizes in the monoclinic space group P2/sub 1//c. The structure has been determined for Na/sub 3/Nd(BO/sub 3/)/sub 2/. A full-matrix least-squares refinement led to R = 0.040. The structure is formed by isolated BO/sub 3/ triangles held together by the neodymium and sodium ions. The rare-earth atoms have a complex eightfold coordination in a covalent BO/sub 3/ matrix.
Research Organization:
Bordeaux-1 Univ., Talence, France
OSTI ID:
6044619
Journal Information:
J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 39:3; ISSN JSSCB
Country of Publication:
United States
Language:
English