【摘 要】
：
A novel ternary borate, sodium strontium pentaborate, NaSrB5O9, has been prepared by solid-state reaction below 800 ℃. The single-crystal X-ray structural anal
【机 构】
：
College of Materials Science and Engineering,Institute of Microstructure and Property of Advanced Ma
【基金项目】
：
北京市自然科学基金;the Talent Training Funds of Beijing;the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality
论文部分内容阅读
A novel ternary borate, sodium strontium pentaborate, NaSrB5O9, has been prepared by solid-state reaction below 800 ℃. The single-crystal X-ray structural analysis showed that NaSrB5O9 crystallizes in monoclinic, space group P21/c with a = 6.499(2), b = 13.979(3), c - 8.045(2) (A), β = 106.92(2)° , V = 699.2(3) (A)3, Z = 4, Mr = 308.66, Dc = 2.932 g/cm3, μ = 7.804 mm-1, F(000) = 584, R = 0.0264 and wR = 0.0621 for 2426 observed reflections and 146 variables. NaSrB5O9 is a layered compound containing double ring B5O11 building units composed of two BO4 tetrahedra and three BO3 triangles. Each B5O11 unit is connected to four other equivalent units through exocyclic oxygen atoms to form a two-dimensional 2∞[B5O9]3- layer. Symmetry-center related layers are stacked along the b axis and held together by Na+ and Sr2+ cations via electrostatic interactions.
其他文献
The chaotic dynamics of a Duffing oscillator with a parametric force is investigated. By using the direct perturbation technique, we analytically obtain the gen
A novel metal-organic coordination polymer [Mn3(2,2-dipha)3(phen)6]n·3nH2O (2,2-dipha = 2,2-diphenic acid, phen = 1,10-phenanthroline) 1 has been hydrothermall
Fe(0.2 mol%):Cu(0.04 mol%):LiNbO3 crystals with different doping concentration of In3+ (0, 1.0, 2.0, 3.0mol%) were grown by Czochralski method, and then oxidize
Isovaleraldehyde possesses malty, fruity, cocoa-like odor and is widely used in fruit, chocolate, coffee flavors. The preparation of natural isovaleraldehyde by
The mechanisms about the waters and methanols effects on the alcoholysis of N-benzyl-3-oxo-β-sultam together with their differences have been studied by using
Based on the fact that some metal ions can catalyze the chemiluminescence (CL) reaction of luminol with K3Fe(CN)6, a novel capillary electrophoresis CL method w
感官类标准样品是标准样品的一大类,是农产品分等定级和定性判定的基础性物质.但目前感官标准样品特别是农产品感官标准样品与理化标准样品的研制存在较大差别,难以采用现有
Nonlinear optical CsB3O5 single crystals have been grown successfully using NaF as a flux. The primary CsB3O5-NaF quasi-binary system has been investigated by X
Wastewater stabilization ponds generate low cost by-products that are useful for agriculture.The utilization of these by-products for soil amendment and as a so
Based on the assumption that the Pomeron is a sum of Regge multipoles, each of which corresponds to a finite gluon ladder, we suggest a way to search the Oddero