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Pramana

, Volume 22, Issue 3–4, pp 377–386 | Cite as

On the possible origins of natural diamonds

  • A R Patel
  • Kuruvilla A Cherian
Nuclear Physics

Abstract

A brief survey of the current theories of formation of diamonds in nature leads to the hypothesis which suggests the possibility of natural diamonds having formed metastably—a hypothesis which has not been enjoying much experimental support in its favour. The authors present briefly some aspects of the investigations which have resulted in demonstrating a new process whereby the dissolution and metastable autoepitaxial (re)crystallization of diamond occurs at atmospheric pressure. A comparison of certain reported growth characteristics of natural (terrestrial) and synthetic (high pressure, solvent-catalyst) diamonds with those of the metastable diamond overgrowths reveal many striking similarities. These results therefore serve as evidence to support the metastable origin hypothesis.

Keywords

Diamond genesis diamond synthesis metastable autoepitaxial crystallization 

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Copyright information

© Indian Academy of Sciences 1984

Authors and Affiliations

  • A R Patel
    • 1
  • Kuruvilla A Cherian
    • 1
  1. 1.Department of PhysicsSardar Patel UniversityVallabh VidyanagarIndia

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