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Sarcopside

Year of discovery: 1868 (Michalkowa, Poland), 1980 (Japan)

Locality list: A locality of sarcopside

• Fe₃(PO₄)₂
• (Fe,Mn,Mg)₃(PO₄)₂
• [Fe²⁺₃][(PO₄)₂]^6-

• Class: Sarcopside group
• Class: Phosphate
• Surface may be coated by phosphate minerals including Vivianite by weathering.

• Polymorph: Graftonite

• Fe => Mg: Farringtonite, Chopinite

• PO₄ => SiO₄: Laihunite

• Color: Colorless
• Tarnish: Brown
• Streak: White
• Luster: Silky
• Diaphaneity: Translucent

• Cleavage: Good on {100} and {001} (2 planes), Poor on {010} (1 plane)
• Hardness: 4
• Density: 3.7

• System: Monoclinic
• Group: 2/m, P2₁/a
• Lattice: a=10.4, b=4.8, c=6.0, β=91.0