Do natural diamonds form from carbon-vapour or liquid-carbon

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SUMMARY

Natural diamonds form from carbon in a liquid state rather than from carbon vapor. This conclusion is supported by recent studies and diagrams illustrating the carbon phase transitions under extreme conditions in the Earth's crust. The discussion highlights the importance of understanding the state of carbon prior to diamond formation, emphasizing the relevance of liquid carbon in this process.

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  • Understanding of carbon phase diagrams
  • Knowledge of high-pressure geology
  • Familiarity with diamond formation processes
  • Basic principles of thermodynamics
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  • Research carbon phase diagrams and their implications for geology
  • Explore high-pressure experimental techniques in mineralogy
  • Study the thermodynamic properties of liquid carbon
  • Investigate the role of temperature and pressure in diamond synthesis
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Geologists, mineralogists, and researchers interested in the formation of natural diamonds and the behavior of carbon under extreme conditions.

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What is the state of carbon just prior to it forming a diamond, deep in the Earth's crust ?
Carbon vapour , or liquid carbon ?.Update: I think I've managed to answer my own question ...

http://www-als.lbl.gov/images/stories/Science_Highlights/Highlights/108carbon1.png
http://www-als.lbl.gov/index.php/holding/276-time-resolved-study-of-bonding-in-liquid-carbon.html But cannot manage to delete this thread :blushing:
 
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Leave it, a reasonable C phase diagram is handy to have on the forum.