rocks. It may be associated with halotrichite, pickeringite, fibroferrite, botryogen, copiapite, jarosite...of the Czech mineralogist František Slavik (1876–1957), professor at Charles University in Prague. Rost...Vrané, Štĕchovice, Jarov, Troja, and Mandát, all Bohemia, Czech Republik (Van Tassel 1972); Smolnik and...magnesio- and alumino-copiapite, fibroferrite, pickeringite, slavikite, gypsum, epsomite, melanterite, and...is invariably accompanied by a few percent of pickeringite, gypsum, or fibroferrite. Slavikite also occurs |