Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Ionic Crystal Structures

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...

Metallic Solids

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....

Molecular and Ionic Solids

Molecular and Ionic Solids

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...

Ionic Compounds: Formulas and Nomenclature

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.

Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.

Valence Bond Theory

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Antiferromagnetic Arsenides U<sub>8</sub>Co<sub>42</sub>As<sub>25</sub> and UCo<sub>3</sub>As<sub>2</sub>.

Inorganic chemistry·2026

Same author

Pressure-induced superconductivity beyond magnetic quantum criticality in a Kondo ferromagnet.

National science review·2026

Same author

Unusual Magnetic Order in Eu<sub>11-<i>x</i></sub> Hg<sub>54+<i>x</i></sub>.

ACS organic & inorganic Au·2026

Same author

Probing thermal stability in CsPbI<sub>3</sub> quantum dots with coupled Pb-site doping and halide passivation.

Nanoscale·2026

Same author

Low-Temperature Defect Healing in the Layered Zintl Phase Li<sub>2</sub>ZnSi.

Inorganic chemistry·2026

Same author

Investigation of the Na-Ga Phase Diagram.

ACS omega·2026

Search research articles

Related Experiment Video

Updated: Jan 5, 2026

Fabrication and Optimization of Type II Silicon Clathrate Films

Fabrication and Optimization of Type II Silicon Clathrate Films

Published on: October 14, 2025

BaGe(5): a new type of intermetallic clathrate.

Umut Aydemir¹, Lev Akselrud, Wilder Carrillo-Cabrera

¹Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden 01187, Germany.

Journal of the American Chemical Society

|August 12, 2010

Summary

A new intermetallic clathrate, Barium Germanide (BaGe5), was discovered. This semiconducting Zintl phase forms through the low-temperature decomposition of a related barium germanide compound.

More Related Videos

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

Published on: August 18, 2022

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Related Experiment Videos

Last Updated: Jan 5, 2026

Fabrication and Optimization of Type II Silicon Clathrate Films

Fabrication and Optimization of Type II Silicon Clathrate Films

Published on: October 14, 2025

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

Published on: August 18, 2022

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Area of Science:

Solid-state chemistry
Materials science
Crystallography

Background:

Intermetallic clathrates are compounds with cage-like structures.
Barium germanides are a class of materials with potential electronic applications.

Purpose of the Study:

To report the discovery and characterization of a new intermetallic clathrate phase, Barium Germanide (BaGe5).
To elucidate the crystal structure and electronic properties of BaGe5.

Main Methods:

Low-temperature decomposition of clathrate-I Ba8Ge43.
X-ray diffraction for crystal structure determination.
Physical property measurements to determine electronic behavior.

Main Results:

A novel intermetallic clathrate, BaGe5, was successfully synthesized.
The crystal structure features characteristic layers interconnected by covalent bonds.
BaGe5 exhibits semiconducting properties, classifying it as a Zintl phase.

Conclusions:

BaGe5 represents a new structural type of intermetallic clathrate.
The discovery expands the known family of barium germanide compounds.
The semiconducting Zintl phase nature of BaGe5 suggests potential for electronic applications.