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Related Concept Videos

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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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α-SrZn5-Type solid solution, BaZn2.6Cu2.4.

Rayko Simura1, Hisanori Yamane1

  • 1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.

Acta Crystallographica. Section E, Crystallographic Communications
|October 23, 2019
PubMed
Summary
This summary is machine-generated.

Researchers synthesized single crystals of barium zinc copper (BaCu2.6Zn2.4) and determined its crystal structure. Despite larger barium atoms, the unit cell volume is smaller than its strontium analog due to copper-zinc substitution.

Keywords:
barium zinc coppercrystal structure

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Area of Science:

  • Solid State Chemistry
  • Crystallography
  • Materials Science

Background:

  • Barium zinc copper (BaCu2.6Zn2.4) is a novel intermetallic compound.
  • The α-SrZn5-type structure is a known crystallographic framework.

Purpose of the Study:

  • To synthesize single crystals of BaCu2.6Zn2.4.
  • To determine the crystal structure of BaCu2.6Zn2.4.
  • To compare the structural properties of BaCu2.6Zn2.4 with related compounds like α-SrZn5.

Main Methods:

  • Single crystal X-ray diffraction analysis.
  • High-temperature synthesis of metal alloys (Ba, Cu, Zn) in an inert atmosphere.
  • Slow cooling technique for crystal growth.

Main Results:

  • Single crystals of BaCu2.6Zn2.4 were successfully obtained.
  • The compound crystallizes in an orthorhombic cell (space group Pnma) with dimensions a = 12.9858(3), b = 5.2162(1), c = 6.6804(2) Å.
  • BaCu2.6Zn2.4 exhibits an α-SrZn5-type structure with a smaller unit cell volume (452.507(19) Å3) compared to α-SrZn5, attributed to Cu-Zn substitution shortening bond lengths.

Conclusions:

  • The crystal structure of BaCu2.6Zn2.4 was elucidated, revealing an α-SrZn5-type framework.
  • Partial substitution of Cu by Zn in the framework leads to a reduced cell volume despite the larger Ba atom.
  • The study provides insights into structure-property relationships in intermetallic compounds.