{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Ishtiyak M"],"funding":["Louisiana State University","Basic Energy Sciences","Louisiana Board of Regents","Division of Materials Research"],"pagination":["20226-20239"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11523219"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["63(43)"],"pubmed_abstract":["Two novel quaternary oxyarsenides, Eu<sub>8</sub>Zn<sub>2</sub>As<sub>6</sub>O and Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O, were synthesized through metal flux reactions, and their crystal structures were established by single-crystal X-ray diffraction methods. Eu<sub>8</sub>Zn<sub>2</sub>As<sub>6</sub>O crystallizes in the orthorhombic space group <i>Pbca</i>, featuring polyanionic ribbons composed of corner-shared triangular [ZnAs<sub>3</sub>] units, running along the [100] direction. The structure of Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O crystallizes in the monoclinic space group <i>P</i>2/<i>m</i> and its anionic substructure can be described as an infinite \"ribbonlike\" chain comprised of [ZnAs<sub>3</sub>] trigonal-planar units, although the structural complexity here is greater and also amplified by disorder on multiple crystallographic positions. In both structures, the O<sup>2-</sup> anion occupies an octahedral void with six neighboring Eu<sup>2+</sup> cations. Formal electron counting, electronic structure calculations, and transport properties reveal the charge-balanced semiconducting nature of these heteroanionic Zintl phases. High-temperature thermoelectric transport properties measurements on Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O reveal relatively high resistivity (<i>ρ</i><sub>500K</sub> = 8 Ω·cm) and Seebeck coefficient values (<i>S</i><sub>500K</sub> = 220 μV K<sup>-1</sup>), along with a low concentration and mobility of holes as the dominant charge-carriers (<i>n</i><sub>500K</sub> = 8.0 × 10<sup>17</sup> cm<sup>-3</sup>, <i>μ</i><sub>500K</sub> = 6.4 cm<sup>2</sup>/V s). Magnetic studies indicate the presence of divalent Eu<sup>2+</sup> species in Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O and complex magnetic ordering, with two transitions observed at <i>T</i><sub>1</sub> = 21.6 K and <i>T</i><sub>2</sub> = 9 K."],"journal":["Inorganic chemistry"],"pubmed_title":["Advancing Heteroanionicity in Zintl Phases: Crystal Structures, Thermoelectric and Magnetic Properties of Two Quaternary Semiconducting Arsenide Oxides, Eu&lt;sub&gt;8&lt;/sub&gt;Zn&lt;sub&gt;2&lt;/sub&gt;As&lt;sub&gt;6&lt;/sub&gt;O and Eu&lt;sub&gt;14&lt;/sub&gt;Zn&lt;sub&gt;5&lt;/sub&gt;As&lt;sub&gt;12&lt;/sub&gt;O."],"pmcid":["PMC11523219"],"funding_grant_id":["LEQSF (2024-27)-RD-A-06","1904636","DE-SC0008885"],"pubmed_authors":["Bobev S","Ishtiyak M","Thipe B","Young DP","Womack F","Adams P","Watts SR","Bai X","Baranets S"],"additional_accession":[]},"is_claimable":false,"name":"Advancing Heteroanionicity in Zintl Phases: Crystal Structures, Thermoelectric and Magnetic Properties of Two Quaternary Semiconducting Arsenide Oxides, Eu&lt;sub&gt;8&lt;/sub&gt;Zn&lt;sub&gt;2&lt;/sub&gt;As&lt;sub&gt;6&lt;/sub&gt;O and Eu&lt;sub&gt;14&lt;/sub&gt;Zn&lt;sub&gt;5&lt;/sub&gt;As&lt;sub&gt;12&lt;/sub&gt;O.","description":"Two novel quaternary oxyarsenides, Eu<sub>8</sub>Zn<sub>2</sub>As<sub>6</sub>O and Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O, were synthesized through metal flux reactions, and their crystal structures were established by single-crystal X-ray diffraction methods. Eu<sub>8</sub>Zn<sub>2</sub>As<sub>6</sub>O crystallizes in the orthorhombic space group <i>Pbca</i>, featuring polyanionic ribbons composed of corner-shared triangular [ZnAs<sub>3</sub>] units, running along the [100] direction. The structure of Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O crystallizes in the monoclinic space group <i>P</i>2/<i>m</i> and its anionic substructure can be described as an infinite \"ribbonlike\" chain comprised of [ZnAs<sub>3</sub>] trigonal-planar units, although the structural complexity here is greater and also amplified by disorder on multiple crystallographic positions. In both structures, the O<sup>2-</sup> anion occupies an octahedral void with six neighboring Eu<sup>2+</sup> cations. Formal electron counting, electronic structure calculations, and transport properties reveal the charge-balanced semiconducting nature of these heteroanionic Zintl phases. High-temperature thermoelectric transport properties measurements on Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O reveal relatively high resistivity (<i>ρ</i><sub>500K</sub> = 8 Ω·cm) and Seebeck coefficient values (<i>S</i><sub>500K</sub> = 220 μV K<sup>-1</sup>), along with a low concentration and mobility of holes as the dominant charge-carriers (<i>n</i><sub>500K</sub> = 8.0 × 10<sup>17</sup> cm<sup>-3</sup>, <i>μ</i><sub>500K</sub> = 6.4 cm<sup>2</sup>/V s). Magnetic studies indicate the presence of divalent Eu<sup>2+</sup> species in Eu<sub>14</sub>Zn<sub>5</sub>As<sub>12</sub>O and complex magnetic ordering, with two transitions observed at <i>T</i><sub>1</sub> = 21.6 K and <i>T</i><sub>2</sub> = 9 K.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Oct","modification":"2025-04-04T01:02:37.813Z","creation":"2025-04-04T01:02:37.813Z"},"accession":"S-EPMC11523219","cross_references":{"pubmed":["38904454"],"doi":["10.1021/acs.inorgchem.4c01580"]}}