Synthesis and Crystal Structure of NaNb2AsO8

• Published in: Journal of solid state chemistry Vol. 113; no. 2; pp. 367 - 372
• Main Authors: Harrison, William T.A., Liang, Cheryl S., Nenoff, Tina M., Stucky, Galen D.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.12.1994; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Inorganic compounds; Optical materials; Optics; Other nonlinear optical materials; photorefractive and semiconductor materials; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Water, oxides, hydroxides, peroxides; Sodium oxides; Inorganic compounds; Channel structure; Transition element compounds; Ultraviolet spectra; Visible spectra; XRD; Experimental study; Arsenic oxides; Niobium oxides; Optical materials; Quaternary compounds; Nonlinear optics; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1006/jssc.1994.1382

The high-temperature/high-pressure hydrothermal synthesis and X-ray single crystal structure of NaNb2AsO8 are reported. The title compound contains a three-dimensional network of NbO6, NbO5, and AsO4 groups, enclosing one-dimensional channels containing seven-coordinate guest sodium cations. UV/visible measurements on NaNb2AsO8 indicate two distinct absorption features at ∼285 and ∼360 nm. Crystal data for NaNb2AsO8: Mr = 410.79, monoclinic, P21/n (No. 14), a = 4.8970(6) Å, b = 8.516(2) Å, c = 15.075(3) Å, β = 98.971(6)°, V = 620.98 Å3, Z = 4, R = 5.31%, Rw = 5.15%, 2121 observed reflections (I > 3 σ(I)).