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Picropharmacolite: Ca4Mg(AsO3OH)2(AsO4)2·11(H2O)
Comments: White, acicular crystalline sprays of picropharmacolite on matrix. Location: Wechsel Schacht, Richelsdorf, Hesse, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Comments: Snow white acicular, radial spray of picropharmacolite with pink sainfeldite. Location: Wilhelm Mine, Richelsdorf District, Hesse, Germany. Scale: Cluster size 6 mm. © Tom Loomis / Dakota Matrix