Measurements of the heat capacity of diamond with different isotopic compositions

M. Cardona, R. K. Kremer, M. Sanati, S. K. Estreicher, T. R. Anthony

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


We report measurements of the heat capacity Cp of diamond with several isotopic compositions (12C1-x13C x) in the 20-280 K temperature range. The results, in particular the derivative of the specific heat with respect to the average isotopic mass, are compared with recent ab initio calculations. Agreement is good for T>150 K. At lower temperatures, the samples with isotopic compositions different from the natural one display an anomalous increase in Cp/T3 with decreasing temperature which is attributed to the presence of metallic inclusions stemming from the metal used as a solvent in the high-pressure high-temperature growth process.

Original languageEnglish
Pages (from-to)465-468
Number of pages4
JournalSolid State Communications
Issue number7
StatePublished - Feb 2005


  • A. Diamond
  • D. Heat capacity
  • D. Stable isotopes


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