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El modelo de tejas de Ammann-Kramer-Neri de un cuasicristal de tipo P-ZnMgEr Bergman basado en la difracción de rayos

Ireneusz Buganski¹, Stanislav Vrtnik², Andreja Jelen²

¹Faculty of Physics and Applied Computer Science, AGH University of Krakow, Al. Mickiewicza 30, Krakow, 30-059, Poland.

Acta crystallographica Section B, Structural science, crystal engineering and materials

|February 11, 2026

Resumen

Los investigadores resolvieron la estructura atómica de un cuasicristal Zn-Mg-Er utilizando difracción de rayos X y modelos de tiling. El estudio identificó tipos de cúmulos híbridos y reveló ideas sobre la unión y el desorden en los cuasicristales de tierras raras.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
La cristalografía es una técnica de cristalografía.
Física de la materia condensada Física de la materia condensada

Sus antecedentes:

Los cuasicristales exhiben estructuras atómicas y propiedades únicas.
Comprender la disposición atómica es crucial para predecir el comportamiento de los materiales.
Los elementos de tierras raras pueden influir significativamente en la formación y las características de los cuasicristales.

Objetivo del estudio:

Para determinar la estructura atómica de un cuasicristal primitivo icosaédrico Zn-Mg-Er.
Para investigar la presencia y disposición de los motivos estructurales clave como los racimos de Bergman y Tsai.
Evaluar la validez del marco de azulejos de Ammann-Kramer-Neri para el modelado de estructuras de cuasicristal.

Principales métodos:

La difracción de rayos X (XRD) se empleó para la recopilación de datos.
El marco de azulejos de Ammann-Kramer-Neri se utilizó para el modelado estructural.
Refinamiento de un modelo estructural contra los picos experimentales de Bragg.

Principales resultados:

Se refinó con éxito un modelo estructural para Zn_70.83Mg_20.31Er_8.86.
Se identificaron los cúmulos de Bergman y Tsai, lo que indica un carácter híbrido de cuasicristal.
Se observaron trastornos de posición y distancias cortas de Mg-Mg dentro de los grupos de Tsai, junto con trastornos fasónicos bajos.

Conclusiones:

El marco de tejas de Ammann-Kramer-Neri reproduce de manera confiable las configuraciones atómicas en cuasicristales.
Este estudio contribuye a comprender la complejidad estructural de los cuasicristales de tierras raras.
Los hallazgos apoyan el uso de modelos basados en azulejos en la investigación cuasicristalina.

Palabras clave:

Ammann Kramer Neri tillado de las baldosas.La fase de Bergman es la fase de Bergman.cristales casicristalinos, por ejemplo.Solución de estructura de la estructura de la solución.

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