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Scorodite (Photo)

Year of discovery: 1818 (Stamm Asser mine, Germany), 1898 (Japan)

Locality list: 72 localities of scorodite

• FeAsO₄,2H₂O
• [Fe³⁺][AsO₄]^3-,2H₂O

• Class: Variscite Group
• Class: Arsenate - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄, concentrated KOH (Decompose), concentrated NaOH (Decompose)
• Odor: Garlic odor (by hitting)
• Alter to Limonite.

• Polymorph: Parascorodite (Trigonal)

• Fe => Al: Mansfieldite (Series)
• Fe => In: Yanomamite (Series)

• AsO₄ => PO₄: Strengite (Series), Phosphosiderite

• Color: Pale green, Bluish green, Gray, Yellowish brown
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Pyramidal, Platy

• Cleavage: Imperfect on {201} (2 planes), Poor on {001} and {100} (2 planes)
• Hardness: 3.5-4
• Density: 3.3

• System: Orthorhombic
• Group: mmm, Pcab
• Lattice: a=8.9, b=10.3, c=10.0