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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...
Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
Imperfections in Crystal Structure: Non-Stoichiometric Defects01:29

Imperfections in Crystal Structure: Non-Stoichiometric Defects

Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...
Structures of Solids02:22

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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.
CFT focuses on...

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Related Experiment Video

Updated: May 9, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Highly ordered noncrystalline metallic phase.

Gabrielle G Long1, Karena W Chapman, Peter J Chupas

  • 1X-Ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. gglong@aps.anl.gov

Physical Review Letters
|July 19, 2013
PubMed
Summary
This summary is machine-generated.

Researchers characterized a unique metallic glass formed during rapid cooling. This novel noncrystalline solid exhibits atomic ordering without long-range symmetry, challenging existing material structures.

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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

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Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
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Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory

Published on: March 7, 2018

Related Experiment Videos

Last Updated: May 9, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
08:58

Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory

Published on: March 7, 2018

Area of Science:

  • Materials Science
  • Solid State Physics
  • Metallurgy

Background:

  • Metallic glasses are amorphous alloys lacking long-range atomic order.
  • Understanding the formation and structure of novel metallic glasses is crucial for developing advanced materials.

Purpose of the Study:

  • To characterize a unique metallic glass formed from an aluminum-iron-silicon (Al-Fe-Si) melt.
  • To investigate the formation mechanism and structural properties of this novel material.

Main Methods:

  • Rapid cooling of an Al-Fe-Si melt.
  • Experimental characterization to determine the material's structure.
  • Analysis of nucleation, growth, and elemental partitioning.

Main Results:

  • The metallic glass forms via nucleation and growth normal to a solid-melt interface.
  • Elemental partitioning occurs during solidification.
  • Experimental evidence confirms the absence of nanometer-sized polycrystalline grains.

Conclusions:

  • The characterized material is not a conventional polycrystalline composite.
  • This unique metallic glass represents a potentially new class of atomically ordered, isotropic, noncrystalline solids.
  • The absence of long-range translational symmetry in this solid is a key characteristic.