Structural studies of two novel La-Sn compounds: La30Sn30 and La32Ni2Sn35

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Two novel intermetallic compounds containing lanthanum and tin have been obtained for the first time. Single crystal structures of these two phases, La{sub 30}Sn{sub 30} and La{sub 32}Ni{sub 2}Sn{sub 35} have been studied by X-ray crystallography. La{sub 30}Sn{sub 30} is a new 1:1 binary containing La and Sn and has been refined in the Cmmm space group. This phase was made at high temperatures (<1200 C) from a loaded composition of La{sub 68}Sn{sub 70}. Unlike the reported 1:1 binary, LaSn which crystallizes in the Cmcm space group (only powder X-ray diffraction studies reported), La{sub 30}Sn{sub 30} forms good crystals for ... continued below

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Yang, Amie S. May 1, 2005.

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  • Ames Laboratory
    Publisher Info: AMES (Ames Laboratory (AMES), Ames, IA)
    Place of Publication: Ames, Iowa

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Two novel intermetallic compounds containing lanthanum and tin have been obtained for the first time. Single crystal structures of these two phases, La{sub 30}Sn{sub 30} and La{sub 32}Ni{sub 2}Sn{sub 35} have been studied by X-ray crystallography. La{sub 30}Sn{sub 30} is a new 1:1 binary containing La and Sn and has been refined in the Cmmm space group. This phase was made at high temperatures (<1200 C) from a loaded composition of La{sub 68}Sn{sub 70}. Unlike the reported 1:1 binary, LaSn which crystallizes in the Cmcm space group (only powder X-ray diffraction studies reported), La{sub 30}Sn{sub 30} forms good crystals for structural determination. The crystal structure of La{sub 30}Sn{sub 30} show Sn-Sn dimers and Sn-centered, face-sharing biaugmented triangular prisms composed of La atoms. La{sub 30}Sn{sub 30} does not belong to any known structure-type. La{sub 32}Ni{sub 2}Sn{sub 35} was obtained in high yields at high temperatures (> 1200 C) and refined in the 14/mmm space group. It belongs to the USi structure type in which the Ni/Sn atoms occupy the Si sites, and La/Sn atoms occupy the U sites. The crystal structure of La{sub 32}Ni{sub 2}Sn{sub 35} consists of buckled sheets made from La-centered, corner-shared octahedra of Sn. These sheets are intraconnected through Ni-Sn-Ni bonds along the c-axis. The crystals are not air sensitive, unlike La{sub 30}Sn{sub 30}, which can be attributed to the presence of Ni in the crystal structure.

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  • Report No.: IS-T 2332
  • Grant Number: W-7405-ENG-82
  • Office of Scientific & Technical Information Report Number: 850066
  • Archival Resource Key: ark:/67531/metadc779704

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 1, 2005

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  • Dec. 3, 2015, 9:30 a.m.

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  • Nov. 3, 2016, 11:37 a.m.

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Yang, Amie S. Structural studies of two novel La-Sn compounds: La30Sn30 and La32Ni2Sn35, thesis or dissertation, May 1, 2005; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc779704/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.