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Halotrichite: Fe++Al2(SO4)4·22(H2O) Szomolnokite: Fe++SO4·(H2O)
Comments: Tan powdery szomolnokite crust on silky fibrous halotrichite with yellow metavoltine. Location: Markey Mine, Red Canyon, San Juan County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Halotrichite: Fe++Al2(SO4)4·22(H2O)
Comments: White, fibrous halotrichite on rock. Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 4.5 cm. © Thomas Witzke / Abraxas-Verlag
Halotrichite: Fe++Al2(SO4)4·22(H2O) Boothite: CuSO4·7(H2O)
Comments: Pale blue earthy boothite with white halotrichite. Location: Copiapo, Atacama, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species