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Related Concept Videos

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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Metallic Solids02:37

Metallic Solids

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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....
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Structures of Solids02:22

Structures of Solids

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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...
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Molecular Comparison of Gases, Liquids, and Solids02:26

Molecular Comparison of Gases, Liquids, and Solids

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Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
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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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Cluster Sampling Method01:20

Cluster Sampling Method

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Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
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Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry
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Intermetalloid Clusters: Molecules and Solids in a Dialogue.

Kerstin Mayer1, Jana Weßing2, Thomas F Fässler1

  • 1Chair of Inorganic Chemistry with Focus on Novel Materials, Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85747, Garching, Germany.

Angewandte Chemie (International Ed. in English)
|August 12, 2018
PubMed
Summary

This review explores creating atom-precise, ligand-stabilized metalloid clusters with diverse metal combinations. These "molecular alloys" bridge the gap between molecular chemistry and solid-state intermetallics, paving the way for novel nanomaterials.

Keywords:
Hume-Rothery phasesZintl anionscage compoundscluster compoundsintermetallic phases

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Solid-State Chemistry

Background:

  • Metalloid clusters offer insights into structure and bonding.
  • Current research is limited to homometallic or pseudo-heterometallic systems.
  • A gap exists between molecular coordination chemistry and solid-state intermetallics.

Purpose of the Study:

  • To extend the diversity of metalloid clusters to include dissimilar d- and p-block metals.
  • To bridge the gap between molecular and solid-state chemistry.
  • To explore the potential of these clusters as precursors to nanomaterials.

Main Methods:

  • Reviewing synthetic strategies for heterometallic metalloid clusters.
  • Analyzing structural and electronic properties of these clusters.
  • Comparing molecular clusters to Zintl and Hume-Rothery phases.

Main Results:

  • Development of methods to create atom-precise, ligand-stabilized clusters with diverse metal combinations.
  • Demonstration of

Conclusions:

  • These molecular alloys serve as crucial intermediates for nanomaterial synthesis.
  • This approach expands the scope of metalloid cluster chemistry.
  • Facilitates understanding of intermetallic bonding from molecular to solid-state levels.