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18 November 2020
by St Petersburg State University
For more than 40 years, researchers study the mineralogy of cinder cones and lava flows from fumaroles in Kamchatka Features were formed after two major eruptions of Tolbachik volcano – in 1975-1976 and 2012-2013 This territory is unique for its mineralogical diversity In recent years, researchers have discovered dozens of new minerals here, many of which are unique in the world.
The recent discovery by scientists at the University of St. Petersburg, the pétrovite, Na10CaCu2 (SO4) 8, occurs as blue globular aggregates of tabular crystals with gaseous inclusions “The copper atom in the crystal structure of petrovite has an unusual and very rare coordination of seven oxygen atoms Such coordination is characteristic of only a few compounds, as well as saranchinaite, which was discovered by our colleagues at the University of Saint Petersburg – the research team of Professor Oleg Siidra “, a déclaré le chef de projet, le professeur Stanislav Filatov de l’Université de Saint-Pétersbourg.
Le minéral est constitué d’atomes d’oxygène, de soufre de sodium et de cuivre, qui forment une ossature poreuse Les vides sont reliés les uns aux autres par des canaux à travers lesquels des atomes de sodium relativement petits peuvent se déplacer Les scientifiques ont donc établi que le type structurel de pétrovite est prometteur pour la conductivité ionique et peut être utilisé comme matériau de cathode pour les batteries à ions sodium.
“Right now, le plus gros problème pour cette utilisation est la petite quantité d’un métal de transition – le cuivre – in the crystal structure of the mineral It could be solved by synthesizing a compound with the same structure as petrovite in the laboratory “, said Filatov
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Mineral, volcan, Tolbachik, electric battery, scientist
News – United States – Petrovite: scientists discover new mineral in Kamchatka