Citation: Pekov, I. V.; Zubkova, N. V.; Yapaskurt, V. O.; Belakovskiy, D. I.; Lykova, I. S.; Vigasina, M. F.; Sidorov, E. G.; Pushcharovsky, D. Y. (2014). New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. I. Yurmarinite, Na7(Fe3+,Mg,Cu)4(AsO4)6. Mineralogical Magazine, 78, pp. 905-917.