作者:Florian Stadler、Wolfgang Schnick
DOI:10.1002/zaac.200600356
日期:2007.4
Z = 2, wRp = 0.0353, Rp = 0.0238, RF2 = 0.0660, 452 observed reflections, 42 parameters). BaSi6N8 crystallizes isotypically with SrSi6N8. The three-dimensional Si-N-network consists of corner-sharing SiN4 tetrahedra and single bonds Si-Si forming N3Si-SiN3 building units. 29Si solid-state NMR spectra of BaSi6N8 resemble those of SrSi6N8 exhibiting two resonances at δ = −54.3 and −28.0 ppm. Their observed
还原型氮化硅酸盐 BaSi6N8 还原型氮化硅酸盐 BaSi6N8 已在约 1650 °C 的射频炉中以氮化钡和二亚胺硅为原料合成。结构已从 X 射线粉末衍射数据确定,并通过 Rietveld 方法(Imm2 (no. 44), a = 793.16(1), b = 934.37(2), c = 483.57(1) pm, V = 358.38(1) ·106 pm3, Z = 2, wRp = 0.0353, Rp = 0.0238, RF2 = 0.0660, 452 个观测反射,42 个参数)。BaSi6N8 与 SrSi6N8 同型结晶。三维 Si-N 网络由共享角的 SiN4 四面体和单键 Si-Si 组成,形成 N3Si-SiN3 构建单元。BaSi6N8 的 29Si 固态 NMR 光谱类似于 SrSi6N8 的那些,在 δ = -54.3 和 -28.0 ppm 处表现出两个共振。他们观察到的强度比约为