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Erythrosiderite: K2Fe+++Cl5·(H2O) Salammoniac: NH4Cl
Comments: Orange-brown aggregates of erythrosiderite with sal ammoniac. Material from the 1926 eruption of the Erythrosiderite is hygroscopic and must be stored in a closed vial. The photo was made through the vial.
Location: Vesuvius, Naples Province, Campania, Italy.
Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag