Abstract
Based on the hypothesis advanced by S. P. Gabuda that the SiO2 molecule could undergo a transition from the linear form to the isomeric form with a ring-shaped (bent) structure, an idea is proposed that when the mantle substance melts, a phase transition of the bent SiO2 form into the linear SiO2 form can occur in the lower mantle. This phase transition might be of great importance for the lower-mantle convection processes and also for the rise of mantle plumes carrying both heat energy, and broad range of platinum group and rare elements to the Earth surface.
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Devoted to the 80th anniversary of Professor S. P. Gabuda
Translated from Zhurnal Strukturnoi Khimii, Vol. 57, No. 2, pp. 430-434, March-April, 2016.
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Khlebopros, R.G., Zakhvataev, V.E., Slepkov, V.P. et al. On the possibility of phase transitions with the formation of SiO2 peroxide forms in the earth mantle and their effect on mantle convection. J Struct Chem 57, 417–421 (2016). https://doi.org/10.1134/S0022476616020256
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DOI: https://doi.org/10.1134/S0022476616020256