Ehrhardt Claus, Gjikaj Mimoza
Institute of Inorganic and Analytical Chemistry, Clausthal University of Technology, Paul-Ernst-Strasse 4, 38678 Clausthal-Zellerfeld, Germany.
Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 3;66(Pt 8):i55. doi: 10.1107/S1600536810025316.
The crystal structure of SrNa(2)(P(2)S(6))·8H(2)O is isotypic with that of its calcium analogue. The asymmetric unit consists of one Sr(2+) cation (2 symmetry), two Na(+) cations (2 and symmetry, respectively), one-half of a centrosymmetric (P(2)S(6))(4-) anion with a staggered confirmation and four water mol-ecules. The crystal structure is built up from layers of cations and anions extending parallel to (101). Each SrO(8) polyhedron is connected via edge-sharing to two NaO(4)S(2) octa-hedra and to one NaO(2)S(4) octa-hedron. The NaO(4)S(2) octa-edra are, in turn, connected with two (P(2)S(6))(4-) anions through common corners. Adjacent layers are held together by several O-H⋯S hydrogen-bonding inter-actions.
SrNa₂(P₂S₆)·8H₂O的晶体结构与其钙类似物的晶体结构同型。不对称单元由一个Sr²⁺阳离子（对称度为2）、两个Na⁺阳离子（分别为对称度2和对称度）、一个具有交错构象的中心对称(P₂S₆)⁴⁻阴离子的一半以及四个水分子组成。晶体结构由平行于(101)延伸的阳离子和阴离子层构成。每个SrO₈多面体通过边共享与两个NaO₄S₂八面体和一个NaO₂S₄八面体相连。NaO₄S₂八面体又通过公共角与两个(P₂S₆)⁴⁻阴离子相连。相邻层通过若干O—H⋯S氢键相互作用维系在一起。
