| Инд. авторы: | Chanyshev A.D., Litasov K.D., Shatskiy A.F., Sharygin I.S., Higo Y., Ohtani E. |
| Заглавие: | Transition from melting to carbonization of naphthalene, anthracene, pyrene and coronene at high pressure |
| Библ. ссылка: | Chanyshev A.D., Litasov K.D., Shatskiy A.F., Sharygin I.S., Higo Y., Ohtani E. Transition from melting to carbonization of naphthalene, anthracene, pyrene and coronene at high pressure // Physics of the Earth and Planetary Interiors. - 2017. - Vol.270. - P.29-39. - ISSN 0031-9201. - EISSN 1872-7395. |
| Внешние системы: | DOI: 10.1016/j.pepi.2017.06.011; РИНЦ: 31063618; SCOPUS: 2-s2.0-85030572330; WoS: 000409286800003; |
| Реферат: | eng: We have examined the decomposition of naphthalene, anthracene, pyrene and coronene at high pressures and temperatures. Experiments were performed using in situ X-ray diffraction in multianvil apparatus at the SPring-8 synchrotron radiation facility. In the pressure range of 1.5–3.7 GPa decomposition of studied polycyclic aromatic hydrocarbons (PAHs) was detected at 773–973 K. Melting was identified only for naphthalene at 727–730 K and 1.5 GPa. Quenched products analyzed by Raman spectroscopy consist of nano- and microcrystalline graphite. The triple points between solid, liquid and carbonized (decomposed) PAHs were placed at 1–2 GPa and 800–850 K. Analyses of P-V-T data indicate that anthracene and coronene possess very low thermal expansion at 1.3–4.2 GPa. The obtained melting and decomposition parameters for PAH restrict PT-conditions of their formation by local impacts during early planetary history, as well as provide evidences for secondary origin of PAH inclusions in natural mantle minerals from kimberlites. © 2017 Elsevier B.V.
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| Ключевые слова: | Thermal expansion; X ray diffraction; High pressure; In-situ X-ray diffraction; Low thermal expansion; Microcrystalline graphite; Multi-anvil apparatus; Polycyclic aromatic hydrocarbons (PAHS); Pressure ranges; Synchrotron radiation facility; Polycyclic aromatic hydrocarbons; carbon; X-ray diffraction; Raman spectroscopy; pyrene; PAH; P-T conditions; naphthalene; melting; high pressure; decomposition; compressibility; Pyrene; Naphthalene; Minerals; Melting; Hydrocarbons; Compressibility; Carbonization; Carbon; Aromatic hydrocarbons; Aromatic compounds; Anthracene; Raman spectroscopy; Raman spectroscopy; In-situ X-ray diffraction; High-pressure; Compressibility; Carbon; Polycyclic aromatic hydrocarbons; Synchrotron radiation; |
| Издано: | 2017 |
| Физ. характеристика: | с.29-39 |