TY JOUR TI Electroacoustic properties of various types of quartz in the finely dispersed state KW artificial and natural quartz KW electroacoustic echo KW relaxation time and echo parameters KW powder JO Vestnik of geosciences AU Kotov, L.N. AU Lasyok, M.P. AU Dong, F.. AU Wei, Z.. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"