{"title":"DyIrSn 和 Lu3Co2In4 型锡化物 Sm3Rh2Sn4 和 RE 3Ir2Sn4（RE = Y、Sm、Gd-Tm、Lu）","authors":"Lars Schumacher, Aylin Koldemir, Rainer Pöttgen","doi":"10.1515/znb-2024-0004","DOIUrl":null,"url":null,"abstract":"The Lu<jats:sub>3</jats:sub>Co<jats:sub>2</jats:sub>In<jats:sub>4</jats:sub>-type stannides <jats:italic>RE</jats:italic> <jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> (<jats:italic>RE</jats:italic> = Y, Sm, Gd–Tm, Lu) were synthesized from the elements by arc-melting and subsequent annealing sequences in sealed silica ampoules. For a more comprehensive phase analytical study, the isotypic stannide Sm<jats:sub>3</jats:sub>Rh<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> and the ZrNiAl-type stannides DyIrSn and LT-YIrSn were also obtained. The polycrystalline samples were characterized through their X-ray powder patterns. The structures of DyIrSn and Gd<jats:sub>3</jats:sub>Ir<jats:sub>2.63(2)</jats:sub>Sn<jats:sub>3.37(2)</jats:sub> (ZrNiAl type, space group <jats:italic>P</jats:italic>6‾2<jats:italic>m</jats:italic>), Sm<jats:sub>3</jats:sub>Ir<jats:sub>2.52(2)</jats:sub>Sn<jats:sub>3.48(1)</jats:sub>, Gd<jats:sub>3</jats:sub>Ir<jats:sub>2.49(1)</jats:sub>Sn<jats:sub>3.51(1)</jats:sub> and Tm<jats:sub>3</jats:sub>Ir<jats:sub>2.20(3)</jats:sub>Sn<jats:sub>3.80(3)</jats:sub> (Lu<jats:sub>3</jats:sub>Co<jats:sub>2</jats:sub>In<jats:sub>4</jats:sub> type, space group <jats:italic>P</jats:italic>6‾) were refined from single-crystal X-ray diffractometer data, revealing residual Ir/Sn disorder in the low-symmetry variants. The <jats:italic>RE</jats:italic> <jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> stannides are derived from the equiatomic stannides <jats:italic>RE</jats:italic>IrSn (≍<jats:italic>RE</jats:italic> <jats:sub>3</jats:sub>Rh<jats:sub>3</jats:sub>Sn<jats:sub>3</jats:sub>) by partial Ir/Sn substitution. The symmetry reduction from space group <jats:italic>P</jats:italic>6‾2<jats:italic>m</jats:italic> to <jats:italic>P</jats:italic>6‾ is forced by the Ir/Sn ordering within the <jats:italic>RE</jats:italic> <jats:sub>6</jats:sub> trigonal prisms. The new Sn2 position shows the rare motif of a trigonal planar tin coordination with 289 pm Sn2–Sn1 distances (data for Gd<jats:sub>3</jats:sub>Ir<jats:sub>2.49(1)</jats:sub>Sn<jats:sub>3.51(1)</jats:sub>). <jats:sup>119</jats:sup>Sn Mössbauer spectra confirm the two crystallographically independent tin sites in Tm<jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> and the structural disorder in Gd<jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub>.","PeriodicalId":23831,"journal":{"name":"Zeitschrift für Naturforschung B","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"DyIrSn and the Lu3Co2In4-type stannides Sm3Rh2Sn4 and RE 3Ir2Sn4 (RE = Y, Sm, Gd–Tm, Lu)\",\"authors\":\"Lars Schumacher, Aylin Koldemir, Rainer Pöttgen\",\"doi\":\"10.1515/znb-2024-0004\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The Lu<jats:sub>3</jats:sub>Co<jats:sub>2</jats:sub>In<jats:sub>4</jats:sub>-type stannides <jats:italic>RE</jats:italic> <jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> (<jats:italic>RE</jats:italic> = Y, Sm, Gd–Tm, Lu) were synthesized from the elements by arc-melting and subsequent annealing sequences in sealed silica ampoules. For a more comprehensive phase analytical study, the isotypic stannide Sm<jats:sub>3</jats:sub>Rh<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> and the ZrNiAl-type stannides DyIrSn and LT-YIrSn were also obtained. The polycrystalline samples were characterized through their X-ray powder patterns. The structures of DyIrSn and Gd<jats:sub>3</jats:sub>Ir<jats:sub>2.63(2)</jats:sub>Sn<jats:sub>3.37(2)</jats:sub> (ZrNiAl type, space group <jats:italic>P</jats:italic>6‾2<jats:italic>m</jats:italic>), Sm<jats:sub>3</jats:sub>Ir<jats:sub>2.52(2)</jats:sub>Sn<jats:sub>3.48(1)</jats:sub>, Gd<jats:sub>3</jats:sub>Ir<jats:sub>2.49(1)</jats:sub>Sn<jats:sub>3.51(1)</jats:sub> and Tm<jats:sub>3</jats:sub>Ir<jats:sub>2.20(3)</jats:sub>Sn<jats:sub>3.80(3)</jats:sub> (Lu<jats:sub>3</jats:sub>Co<jats:sub>2</jats:sub>In<jats:sub>4</jats:sub> type, space group <jats:italic>P</jats:italic>6‾) were refined from single-crystal X-ray diffractometer data, revealing residual Ir/Sn disorder in the low-symmetry variants. The <jats:italic>RE</jats:italic> <jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> stannides are derived from the equiatomic stannides <jats:italic>RE</jats:italic>IrSn (≍<jats:italic>RE</jats:italic> <jats:sub>3</jats:sub>Rh<jats:sub>3</jats:sub>Sn<jats:sub>3</jats:sub>) by partial Ir/Sn substitution. The symmetry reduction from space group <jats:italic>P</jats:italic>6‾2<jats:italic>m</jats:italic> to <jats:italic>P</jats:italic>6‾ is forced by the Ir/Sn ordering within the <jats:italic>RE</jats:italic> <jats:sub>6</jats:sub> trigonal prisms. The new Sn2 position shows the rare motif of a trigonal planar tin coordination with 289 pm Sn2–Sn1 distances (data for Gd<jats:sub>3</jats:sub>Ir<jats:sub>2.49(1)</jats:sub>Sn<jats:sub>3.51(1)</jats:sub>). <jats:sup>119</jats:sup>Sn Mössbauer spectra confirm the two crystallographically independent tin sites in Tm<jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub> and the structural disorder in Gd<jats:sub>3</jats:sub>Ir<jats:sub>2</jats:sub>Sn<jats:sub>4</jats:sub>.\",\"PeriodicalId\":23831,\"journal\":{\"name\":\"Zeitschrift für Naturforschung B\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-02-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Zeitschrift für Naturforschung B\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1515/znb-2024-0004\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zeitschrift für Naturforschung B","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/znb-2024-0004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
DyIrSn and the Lu3Co2In4-type stannides Sm3Rh2Sn4 and RE 3Ir2Sn4 (RE = Y, Sm, Gd–Tm, Lu)
The Lu3Co2In4-type stannides RE3Ir2Sn4 (RE = Y, Sm, Gd–Tm, Lu) were synthesized from the elements by arc-melting and subsequent annealing sequences in sealed silica ampoules. For a more comprehensive phase analytical study, the isotypic stannide Sm3Rh2Sn4 and the ZrNiAl-type stannides DyIrSn and LT-YIrSn were also obtained. The polycrystalline samples were characterized through their X-ray powder patterns. The structures of DyIrSn and Gd3Ir2.63(2)Sn3.37(2) (ZrNiAl type, space group P6‾2m), Sm3Ir2.52(2)Sn3.48(1), Gd3Ir2.49(1)Sn3.51(1) and Tm3Ir2.20(3)Sn3.80(3) (Lu3Co2In4 type, space group P6‾) were refined from single-crystal X-ray diffractometer data, revealing residual Ir/Sn disorder in the low-symmetry variants. The RE3Ir2Sn4 stannides are derived from the equiatomic stannides REIrSn (≍RE3Rh3Sn3) by partial Ir/Sn substitution. The symmetry reduction from space group P6‾2m to P6‾ is forced by the Ir/Sn ordering within the RE6 trigonal prisms. The new Sn2 position shows the rare motif of a trigonal planar tin coordination with 289 pm Sn2–Sn1 distances (data for Gd3Ir2.49(1)Sn3.51(1)). 119Sn Mössbauer spectra confirm the two crystallographically independent tin sites in Tm3Ir2Sn4 and the structural disorder in Gd3Ir2Sn4.
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