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Single-crystal X-ray structure analysis revealed that BaCu<jats:sub>2.6<\/jats:sub>Zn<jats:sub>2.4<\/jats:sub> crystallizes in an orthorhombic cell [<jats:italic>a<\/jats:italic> = 12.9858\u2005(3), <jats:italic>b<\/jats:italic> = 5.2162\u2005(1), and <jats:italic>c<\/jats:italic> = 6.6804\u2005(2)\u2005\u00c5] with an \u03b1-SrZn<jats:sub>5<\/jats:sub>-type structure (space group <jats:italic>Pnma<\/jats:italic>). The three-dimensional framework consists of Cu and Zn atoms, with Ba atoms in the tunnels extending in the <jats:italic>b<\/jats:italic>-axis direction. Although the Ba atom is larger than the Sr atom, the cell volume of BaCu<jats:sub>2.6<\/jats:sub>Zn<jats:sub>2.4<\/jats:sub> [452.507\u2005(19)\u2005\u00c5<jats:sup>3<\/jats:sup>] is smaller than that of \u03b1-SrZn<jats:sub>5<\/jats:sub> [466.08\u2005\u00c5<jats:sup>3<\/jats:sup>]. This decrease in volume can be attributed to the partial substitution of Cu atoms by Zn atoms in the framework because the Cu\u2014Zn and Cu\u2014Cu bonds are shorter than the Zn\u2014Zn bond. The increase in Ba\u2014Zn interatomic distances from the Sr\u2014Zn distances is cancelled out by the partial replacement of Zn with Cu atoms, which leads to shorter average Ba\u2014Zn\/Cu distances.<\/jats:p>","DOI":"10.1107\/s2056989019012532","type":"journal-article","created":{"date-parts":[[2019,9,20]],"date-time":"2019-09-20T11:10:57Z","timestamp":1568977857000},"page":"1490-1493","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":1,"title":["\u03b1-SrZn<sub>5<\/sub>-Type solid solution, BaZn<sub>2.6<\/sub>Cu<sub>2.4<\/sub>"],"prefix":"10.1107","volume":"75","author":[{"given":"Rayko","family":"Simura","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hisanori","family":"Yamane","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"329","published-online":{"date-parts":[[2019,9,20]]},"reference":[{"key":"vn2152_bb1","doi-asserted-by":"crossref","first-page":"361","DOI":"10.1107\/S0365110X56001066","volume":"9","author":"Baenziger","year":"1956","journal-title":"Acta Cryst."},{"key":"vn2152_bb2","unstructured":"Bruker (1997). 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