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Related Experiment Video

Updated: Jun 5, 2026

Fabrication of Uniform Nanoscale Cavities via Silicon Direct Wafer Bonding

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Published on: January 9, 2014

Bonding in beryllium clusters.

Michael C Heaven¹, Jeremy M Merritt, Vladimir E Bondybey

¹Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA. mheaven@emory.edu

Annual Review of Physical Chemistry

|January 12, 2011

Summary

Beryllium clusters reveal a transition from molecular to metallic behavior. Calculations show increasing bond energies and early metallic properties in Be(n) clusters, highlighting their use in quantum chemistry method evaluation.

Area of Science:

Quantum Chemistry
Materials Science
Condensed Matter Physics

Background:

Beryllium clusters bridge the gap between discrete molecules and bulk metallic states.
The beryllium dimer is weakly bound with a formal bond order of zero, contrasting with hard, high-melting-point bulk beryllium.
Despite its elemental simplicity, beryllium cluster calculations are complex due to strong electron correlation and configuration interaction.

Purpose of the Study:

To investigate the evolution of bonding and electronic properties in beryllium clusters (Be(n)) from small molecules to metallic behavior.
To explore the emergence of metallic characteristics in Be(n) clusters as a function of size.
To utilize beryllium clusters as benchmark systems for advanced quantum chemistry methods.

Main Methods:

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High-level theoretical calculations were employed to study beryllium clusters.
The study focused on the size range of Be(n) clusters from n=2 to n=6.
Analysis included bond energies and electronic ground states.

Main Results:

Bond energies significantly increase for beryllium clusters in the Be(2) to Be(6) range.
A triplet ground state was identified for Be(6), indicating early metallic properties.
The study confirms the computational challenges associated with beryllium due to electron correlation effects.

Conclusions:

Beryllium clusters exhibit a rapid transition towards metallic properties with increasing size.
The Be(6) cluster's triplet ground state signifies an early emergence of metallic characteristics.
Beryllium clusters serve as critical benchmark systems for validating and advancing quantum chemistry methodologies.