Crystal structure of lutetium aluminate (LUAM), Lu4Al2O9

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The crystal structure of the title compound containing lutetium, the last element in the lanthanide series, was determined using a single crystal prepared by heating a pressed pellet of a 2:1 molar ratio mixture of Lu2O3 and Al2O3 powders in an Ar atmosphere at 2173 14;K for 4 14;h. Lu4Al2O9 is isostructural with Eu4Al2O9 and composed of Al2O7 ditetrahedra and Lu-centered six-and sevenfold oxygen polyhedra. The unit-cell volume, 787.3 14;(3) 14;Å3, is the smallest among the volumes of the rare-earth (RE) aluminates, RE 4Al2O9. The crystal studied was refined as a two-component pseudo-merohedric twin.

Original languageEnglish
Pages (from-to)752-755
Number of pages4
JournalActa Crystallographica Section E: Crystallographic Communications
Publication statusPublished - 2020 May 1


  • Crystal structure
  • LuO-AlO system
  • LuAlO
  • Lutetium aluminate monoclinic (LUAM)
  • Rare-earth aluminate
  • Single-crystal X-ray diffraction


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