Low-temperature flux syntheses and characterizations of two 1-D anhydrous borophosphates: Na 3B 6PO 13 and Na 3BP 2O 8
Abstract
Two new anhydrous sodium borophosphates with one-dimensional structure, Na 3B 6PO 13(1) and Na 3BP 2O 8(2), were synthesized by low-temperature molten salts techniques using boric acid and sodium dihydrogen phosphate as flux, respectively. The crystal structures were solved by means of single-crystal X-ray diffraction ( 1, orthorhombic, Pnma (no. 62), a=9.3727(4) Å, b=16.2307(7) Å, c=6.7232(3) Å, Z=4; 2 , monoclinic, C2/ c (no. 15), a=12.567(4) Å, b=10.290(3) Å, c=10.210(3) Å, β=92.492(5)°, Z=8). Compound 1 is characterized by an infinite chain of ∞1{[BPO]} containing eight-membered rings in which all vertexes of borate groups contribute to interconnection. Compound 2 reveals an infinite straight chain ∞1{[BPO]} built of vertex-sharing four-membered rings, and chains in neighboring layers arranged along different orientations. The relations between structures and the synthetic conditions with only traced water are discussed.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- January 2007
- DOI:
- 10.1016/j.jssc.2006.09.034
- Bibcode:
- 2007JSSCh.180..233X