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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 CuO<jats:sub>\n                     <jats:italic>n<\/jats:italic>\n                  <\/jats:sub> (<jats:italic>n<\/jats:italic> = 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 PO<jats:sub>4<\/jats:sub> tetrahedra. This arrangement allows the construction of layers extending parallel to the (100) plane and hosts suitable cavities in which Ag<jats:sup>+<\/jats:sup> and Sr<jats:sup>2+<\/jats:sup> 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.<\/jats:p>","DOI":"10.1107\/s2056989020000109","type":"journal-article","created":{"date-parts":[[2020,1,10]],"date-time":"2020-01-10T09:44:30Z","timestamp":1578649470000},"page":"186-191","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":5,"title":["Crystal structure of silver strontium copper orthophosphate, AgSr<sub>4<\/sub>Cu<sub>4.5<\/sub>(PO<sub>4<\/sub>)<sub>6<\/sub>"],"prefix":"10.1107","volume":"76","author":[{"given":"Jamal","family":"Khmiyas","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elhassan","family":"Benhsina","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Said","family":"Ouaatta","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abderrazzak","family":"Assani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2655-0230","authenticated-orcid":true,"given":"Mohamed","family":"Saadi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7980-974X","authenticated-orcid":true,"given":"Lahcen","family":"El Ammari","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2020,1,10]]},"reference":[{"key":"vn2155_bb1","doi-asserted-by":"crossref","first-page":"281","DOI":"10.1016\/j.ssi.2003.04.002","volume":"168","author":"Adams","year":"2004","journal-title":"Solid State Ionics"},{"key":"vn2155_bb2","doi-asserted-by":"crossref","first-page":"i56","DOI":"10.1107\/S1600536813020977","volume":"69","author":"Alhakmi","year":"2013","journal-title":"Acta Cryst. 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