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Related Experiment Videos

Calcium phosphate clusters.

N Kanzaki1, G Treboux, K Onuma

  • 1School of Science and Engineering Waseda University, Tokyo, Japan.

Biomaterials
|September 20, 2001
PubMed
Summary
This summary is machine-generated.

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Ab initio calculations reveal that Posner

Area of Science:

  • Computational Chemistry
  • Materials Science
  • Biomineralization

Background:

  • Amorphous calcium phosphate (ACP) is a precursor in bone mineralization.
  • The structure of ACP remains incompletely understood.
  • Posner's cluster (Ca9(PO4)6) is a proposed core structure for ACP.

Purpose of the Study:

  • To investigate the potential energy surfaces of calcium phosphate clusters.
  • To evaluate Posner's cluster and aggregated clusters as models for ACP.

Main Methods:

  • Ab initio calculations were performed for [Ca3(PO4)2]n clusters (n=1-4).
  • Energy criteria were used to assess cluster stability and favorability.

Main Results:

  • For separated clusters, energy analysis favors Posner's cluster (Ca9(PO4)6).

Related Experiment Videos

  • A distinct CaO bonding pattern supports the stability of Posner's cluster.
  • Aggregation of Ca3(PO4)2 clusters presents an alternative model for ACP.

    • Conclusions:

    • Posner's cluster is energetically favored as a separated unit.
    • Aggregated calcium phosphate clusters offer a viable alternative structural model for amorphous calcium phosphate.