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Related Concept Videos

Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
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...
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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Updated: Jun 12, 2026

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles
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Published on: October 16, 2017

Non-periodicity in nanoparticles with close-packed structures.

Andrey Rempel1, Andreas Magerl

  • 1Institute of Solid State Chemistry, Pervomaiskaya 91, Ekaterinburg, Russia.

Acta Crystallographica. Section A, Foundations of Crystallography
|June 18, 2010
PubMed
Summary
This summary is machine-generated.

Stacking faults are common in cadmium sulfide (CdS) nanomaterials. These faults are not defects but inherent characteristics of nanomaterials.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Physics

Background:

  • II-VI semiconductor compounds, such as cadmium sulfide (CdS), are widely used in nanomaterials.
  • High densities of stacking faults have been experimentally observed in these nanomaterials.

Purpose of the Study:

  • To investigate the nature of stacking faults in II-VI compound nanomaterials.
  • To determine if stacking faults are intrinsic properties or defects in nanomaterials.

Main Methods:

  • Experimental observation of nanomaterials.
  • Analysis of crystal structures and fault densities.

Main Results:

  • Cadmium sulfide (CdS) nanomaterials exhibit a high density of stacking faults.
  • The observed stacking faults are argued to be characteristic features, not defects.

Conclusions:

  • Stacking faults are an intrinsic characteristic of II-VI compound nanomaterials.
  • Rethinking the definition of defects in the context of nanomaterials is necessary.