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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

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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.
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...
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Lattice Centering and Coordination Number02:33

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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
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Valence Bond Theory02:42

Valence Bond Theory

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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...
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Network Covalent Solids02:18

Network Covalent Solids

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
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Updated: Sep 13, 2025

Niobium Oxide Films Deposited by Reactive Sputtering: Effect of Oxygen Flow Rate
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Niobium Oxide Films Deposited by Reactive Sputtering: Effect of Oxygen Flow Rate

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Primitive Cubic Cation-Disordered Niobium Tungsten Oxides.

Basirat Raji-Adefila1, You Wang1, Junming Yue2

  • 1Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States.

JACS Au
|August 1, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed new cation-disordered niobium tungsten oxides (NbWOs) using mechanochemistry. These materials exhibit unique properties and a novel structural change mechanism when used as lithium-ion battery anodes.

Keywords:
ReO3 structurebatterycation disorderniobium tungsten oxidessolid-state chemistrysolid-state spectroscopy

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Electrochemistry

Background:

  • Metastable cation-disordered oxides are crucial for materials science.
  • Developing novel, simple structures for cation disorder remains a research gap.

Purpose of the Study:

  • To explore new cation-disordered structural types using niobium tungsten oxides (NbWOs).
  • To investigate the properties and applications of these novel materials.

Main Methods:

  • Utilized mechanochemistry to synthesize primitive cubic cation-disordered NbWOs with a ReO3-type structure.
  • Investigated the electronic and vibrational properties of the synthesized materials.
  • Evaluated the performance of NbWOs as lithium-ion battery anodes.

Main Results:

  • Successfully synthesized cation-disordered NbWOs with a ReO3-type structure.
  • Observed unique electronic and vibrational properties in the disordered NbWOs.
  • Discovered a novel perovskite-rock salt structural transformation mechanism in Li-ion battery anodes.

Conclusions:

  • Mechanochemistry is an effective method for creating new cation-disordered materials.
  • The developed NbWOs offer unique properties and a distinct battery anode mechanism.
  • This work opens avenues for discovering new material structures and properties.