K.Yu. Kravets – Post-graduate Student, Vernadsky Institute of Geochemistry and Analytical Chemistry of RAS (Moscow)
E-mail: Konstantin@kravets.ru
Ya.O. Simanovsky – Ph.D. (Phys.-Math.), Senior Research Scientist,
Prokhorov General Physics Institute of RAS (Moscow)
E-mail: yasimanovskiy@mail.ru
A.A. Grechnikov – Dr.Sc. (Chem.), Leading Research Scientist, Vernadsky Institute of Geochemistry and Analytical Chemistry of RAS (Moscow)
E-mail: agrech@bk.ru