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Eosphorite

Year of discovery: 1878 (Fillow quarry (Branchville quarry), USA), 1977 (Japan)

Locality list: 2 localities of eosphorite

• MnAlPO₄(OH)₂,H₂O
• (Mn,Fe)AlPO₄(OH)₂,H₂O
• [Mn²⁺][Al³⁺][(OH)₂|PO₄]^5-,H₂O

• Class: Childrenite group
• Class: Phosphate - Hydroxide - Hydrate
• Soluble in: HCl, HNO₃, H₂SO₄

• Mn => Fe: Childrenite (Series)

• Color: Pale brown
• Tarnish: Dark brown-Black (by weathering)
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Imperfect on {100} (1 planes)
• Hardness: 5
• Density: 3.1

• System: Orthorhombic
• Group: mmm, Cmca
• Lattice: a=6.9, b=10.4, c=13.5