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Crystalline Carbon and Silicon: Covalent or Ionic?

Author:

Williams, Joel Mann

Category:

Research Papers

Sub-Category:

Chemistry

Language:

English

Date Published:

March 12, 2014

File:

/Research Papers-Chemistry/Download/5363

Downloads:

1375

Keywords:

Atom bonding, semiconductors, molecular orbitals, electron orbital models

Abstract:

Diamonds and silicon wafers are prized materials that share a common crystal structure. Tetrahedral atom interactions are the basis for their properties: hardness, thermal conductivity, electrical non-conductivity, etc. sp3-Hybrid orbitals provide the current explanation for the interatomic “bond” connections. These covalent bonds, however, do not provide an adequate mechanism for these materials acting as semiconductors. Ionic bonding between atoms with the crystal lattice fully connected via overlapped, but “unoccupied”, orbitals does provide a logical structure to explain how semiconductor doping works, however.

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