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Siderite (Photo) [abbr. Sd ]

Year of discovery: 1845 (World), 1875 (Japan)

Locality list: 311 localities of siderite

• FeCO₃
• [Fe²⁺][CO₃]^2-

• Class: Calcite group
• Class: Carbonate
• Soluble in: Water (Slightly), hot HCl (with bubbles)
• Magnetism: Paramagnetic
• Substitution pseudomorph: Replace Cerussite.
• Substitution pseudomorph: Replaced by Goethite or Pharmacosiderite.

• Fe => Ca: Calcite, Aragonite, Vaterite
• Fe => Mg: Magnesite (Series)
• Fe => Ni: Gaspéite (Gaspeite)
• Fe => Co: Spherocobaltite
• Fe => Cd: Otavite
• Fe => Mn: Rhodochrosite (Series)
• Fe => Zn: Smithsonite (Series)
• Fe => Ba: Witherite
• Fe => Sr: Strontianite
• Fe => Pb: Cerussite
• Fe => Na₂: Gregoryite

• Color: Yellow, Brown
• Tarnish: Dark brown, Black (Mn-bearing siderite)
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Rhombohedral

• Cleavage: Perfect on {1011} (3 planes)
• Hardness: 3.5-4.5
• Density: 4.0

• System: Trigonal
• Group: (-3)m, R(-3)c
• Lattice: a=4.7, c=15.4

Etymology: Sideros (Iron) in Greek