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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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Color in Coordination Complexes
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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
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Orden de corto alcance en el marco observado en un conductor supersupramolecular tipo espinela

Yu Chen1,2, Caleb Ramette3, Matthew Krogstad4

  • 1Department of Materials Science and Engineering, University of California Berkeley, Berkeley, California 94720, United States.

Journal of the American Chemical Society
|February 23, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores estudiaron un conductor supersupramolecular de litio, Li$_{16.2(1)}$In$_{9.00(2)}$Sn$_{1.10(1)}$O$_{23.8}$ (LISO), revelando un orden de corto alcance en su estructura. Este hallazgo ayuda a comprender las relaciones estructura-propiedad en conductores iónicos desordenados.

Palabras clave:
conductores iónicosorden de corto alcanceespínelasdifracción de neutronesciencia de materiales

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Área de la Ciencia:

  • Ciencia de materiales
  • Química de estado sólido
  • Cristalografía

Sus antecedentes:

  • Los conductores supersupramoleculares de estado sólido exhiben desórdenes estructurales complejos cruciales para su función.
  • El orden de corto alcance en estos materiales a menudo no se detecta mediante métodos convencionales, lo que dificulta el establecimiento de relaciones precisas entre estructura y propiedad.

Objetivo del estudio:

  • Caracterizar las sutilezas estructurales del conductor supersupramolecular de litio Li$_{16.2(1)}$In$_{9.00(2)}$Sn$_{1.10(1)}$O$_{23.8}$ (LISO).
  • Investigar el papel del orden de corto alcance en la estabilidad de fase y la conductividad iónica de LISO.

Principales métodos:

  • Síntesis y caracterización de cristales únicos.
  • Difracción de neutrones de cristales únicos.
  • Dispersión difusa de sincrotrón, análisis 3D-ΔPDF y simulaciones de Monte Carlo.

Principales resultados:

  • LISO exhibe una fase similar a una espinela con una sobreestequiometría de litio significativa y una red de litio que comparte caras.
  • La difracción de neutrones confirmó un desorden sustancial de litio, incluida la división de sitios y la ocupación parcial.
  • La dispersión difusa y los análisis avanzados revelaron un orden de corto alcance en el marco que no es de litio.

Conclusiones:

  • El orden de corto alcance en el marco LISO puede mejorar la estabilidad de fase y la conductividad iónica.
  • Este estudio demuestra la visualización de la energética local en conductores iónicos desordenados.
  • Las relaciones precisas entre estructura y propiedad en conductores supersupramoleculares pueden elucidarse a través de técnicas de caracterización avanzadas.