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関連する概念動画

Ionic Crystal Structures02:42

Ionic Crystal Structures

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.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...

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関連する実験動画

Updated: May 12, 2026

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
08:13

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

Published on: February 19, 2018

A (3 + 3) 次元の"超立方体"酸化イオン導体:II型Bi2O3-Nb2O5O3型

Chris D Ling1, Siegbert Schmid, Peter E R Blanchard

  • 1School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia. chris.ling@sydney.edu.au

Journal of the American Chemical Society
|April 11, 2013
PubMed
まとめ

ビスムート酸化物 (δ-Bi2O3) を移行金属で室温で安定させることで,複雑な超立方体構造が形成されます. 私たちはそのような構造の1つを解き,秩序付けられた空白を持つ"膨らんだ"ピロクロールを明らかにし,その高いイオン伝導性を説明しました.

さらに関連する動画

A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration
09:09

A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration

Published on: March 29, 2019

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
08:49

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

Published on: December 4, 2014

関連する実験動画

Last Updated: May 12, 2026

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
08:13

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area

Published on: February 19, 2018

A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration
09:09

A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration

Published on: March 29, 2019

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
08:49

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

Published on: December 4, 2014

科学分野:

  • マテリアルサイエンス 材料科学
  • 固体化学 固体化学
  • クリスタルグラフィーです.

背景:

  • ビスマウト酸化物 (Bi2O3) は,高温立方相 (δ-Bi2O3) で優れた酸化イオン伝導性を示しています.
  • 低温で δ-Bi2O3 を安定させるには,しばしばドーピングが伴うため,理解が不十分である複雑な調節構造が生じる.
  • これらの複雑な構造は,固体酸化物燃料電池のようなアプリケーションのためのBi2O3ベースの材料の完全な利用を妨げています.

研究 の 目的:

  • ドーピングされたBi2O3システムの複雑な (3+3) 次元不均衡に調節された超立方体の構造を定量的に解き,精製する.
  • これらの材料における高酸化物-イオン伝導性の構造的根拠を解明する.
  • 安定した δ-Bi2O3.3 の構造,ドーピング,イオン輸送の関係を理解する.

主な方法:

  • 新しいリフルーシング浮動ゾーン法を使用して,センチメートルのスケールの単結晶の成長.
  • 高品質の単結晶中性子 difraktion データの収集.
  • 超空間対称性形式主義の中でX線と中性子 difraktion データの両方を用いて構造の解決と精錬.

主要な成果:

  • 構造はうまく解き,精錬され",膨らんだ"ピロクロール構造を明らかにしました.
  • 角に繋がったNbO6の八面鎖は,分離することで固体溶液を収納する.
  • オキシドの空白は,オクターエドール鎖の中で部分的に順番に並び,部分的には3Dのチャンネルネットワークで分布していることが判明しました.

結論:

  • 解けた超立方体の構造は,安定した δ-Bi2O3.3 の定量的な理解を提供します.
  • "膨らんだ"ピロクロール構造によって促進される広範なBi2O3のようなチャネルの3Dネットワークは,高酸化物-イオン伝導性に責任があります.
  • この研究は,Bi2O3ベースのイオン導体の設計と最適化への道を開く.