S.K. Filatov, L.P. Vergasova, M.G. Gorskaya, S.V. Krivovichev, P.C. Burns, V.V. Ananiev (2001) Bradaczekite, NaCu4 (AsO4)3, a new mineral species from the Tolbachik volcano, Kamchatka Peninsula, Russia. Can. Mineral., 39, 1115–1119.

The mineral forms aggregates of dark blue grains, each about 0.2 mm long and up to 0.2 mm across. Electron microprobe analysis gave Na2O 5.17, K2O 0.35, CuO 43.13, Zn 0.79, Fe2O3 0.38, As2O5 49.62, V2O5 0.13, sum 99.55 wt%, corresponding to (Na1.16K0.05)∑1.21(Cu3.74Zn...

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