pharmacosiderite
noun
phar·ma·co·siderite
: a mineral Fe3(AsO4)2(OH)3.5H2O consisting of a hydrous basic iron arsenate commonly occurring in green or yellowish green cubic crystals (hardness 2.5, specific gravity 2.9–3)
Word History
Etymology
German pharmakosiderit, from pharmako- pharmaco- + siderit siderite