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  • 1 Moscow Engineering Physics Institute Kashirskoye shosse, 31 Moscow (Russia)
  • | 2 Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences Kosygin st. 19 117975 Moscow (Russia)
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A method for determination of carbon content in natural silicate crystals has been elaborated using the12C(d,n)13N reaction. Etching of crystal surfaces by acid solutions is proposed to remove the pollutant surface layers. Carbon contents varying from 8 to 100 ppm were measured for olivine, orthopyroxene and gamet crystals.