Nanodiamond formation in natural processes from fluid systems at low P-T parameters |
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| Authors: | Simakov S K |
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| Institution: | 1.St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia
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| Abstract: | The paper presents a new physicochemical model of the formation of nanosized diamonds from an OHC fluid system under low temperature
and pressure conditions corresponding to the graphite stability area. This model in general explains the specific features
of the composition of gas mixtures for CVD and hydrothermal synthesis in terms of diamond growth and formation under metastable
conditions. It also explains the origin of nanodiamonds and microdiamonds in metamorphic rocks of the Earth’s crust and the
genesis of nanodiamonds in outer space at low temperatures and pressures. |
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