Dordević Tamara
Institut für Mineralogie und Kristallographie, Universität Wien-Geozentrum, Althanstrasse 14, A-1090 Vienna, Austria.
Acta Crystallogr Sect E Struct Rep Online. 2008 Aug 9;64(Pt 9):i57. doi: 10.1107/S1600536808025336.
The title compound, BaZnAs(2)O(7), belongs to the family of isotypic series of compounds adopting the general formula M1(2+)M2(2+)X(2)O(7) (M1(2+) = Ca, Sr, Ba or Pb; M2(2+) = Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn or Cd; X = P or As). Suitable single crystals were prepared under hydro-thermal conditions. The framework structure is characterized by corner-sharing ZnO(5) square pyramids and As(2)O(7) groups where the Zn atoms occupy channels. X-ray diffraction analysis of single crystals twinned by non-merohedry [twin plane is (100)] yielded formula BaZnAs(2)O(7). Raman spectra confirmed the presence of a non-linear As-O-As linkage.
标题化合物BaZnAs₂O₇属于通式为M1²⁺M2²⁺X₂O₇（M1²⁺ = Ca、Sr、Ba或Pb；M2²⁺ = Mg、Cr、Mn、Fe、Co、Ni、Cu、Zn或Cd；X = P或As）的同型系列化合物家族。在水热条件下制备了合适的单晶。其骨架结构的特征是由共用顶角的ZnO₅四方锥和As₂O₇基团组成，其中Zn原子占据通道。对由非全对称孪晶[孪晶面为(100)]的单晶进行X射线衍射分析，得到化学式BaZnAs₂O₇。拉曼光谱证实存在非线性的As - O - As键。
