Citation: Pekov, I. V.; Zubkova, N. V.; Yapaskurt, V. O.; Kartashov, P. M.; Polekhovsky, Y. S.; Murashko, M. N.; Pushcharovsky, D. Y. (2014). Koksharovite, CaMg2Fe3+4(VO4)6, and grigorievite, Cu3Fe3+2Al2(VO4)6, two new howardevansite-group minerals from volcanic exhalations. European Journal of Mineralogy, 26, pp. 667-677.