Crystal structure of silver strontium copper orthophosphate, AgSr4Cu4.5(PO4)6

Acta Crystallographica Section E: Crystallographic Communications

Jamal Khmiyas¹  Mohamed Saadi¹  Elhassan Benhsina¹  Said Ouaatta¹  Lahcen El Ammari¹  Abderrazzak Assani¹ 

[1] Laboratoire de Chimie Appliquée des Matériaux, Centre des Sciences des Matériaux, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Batouta, BP 1014, Rabat, Morocco;

关键词: crystal structure;    agsr4cu4.5(po4)6;    transition metal phosphate;    hydrothermal synthesis;    layered structure;   

DOI  :  10.1107/S2056989020000109

来源: DOAJ

【 摘 要 】

Crystals of the new compound, AgSr4Cu4.5(PO4)6, were grown successfully by the hydrothermal process. The asymmetric unit of the crystal structure of the title compound contains 40 independent atoms (4 Sr, 4.5 Cu, 1 Ag, 6 P and 24 O), which are all in general positions except for one Cu atom, which is located on an inversion centre. The Cu atoms are arranged in CuOn (n = 4 or 5) polyhedra, linked through common oxygen corners to build a rigid three-dimensional motif. The connection of these copper units is assured by PO4 tetrahedra. This arrangement allows the construction of layers extending parallel to the (100) plane and hosts suitable cavities in which Ag+ and Sr2+ cations are located. The crystal-structure cohesion is ensured by ionic bonds between the silver and strontium cations and the oxygen anions belonging to two adjacent sheets. Charge-distribution analysis and bond-valence-sum calculations were used to validate the structural model.

【 授权许可】

Unknown