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Emmonsite

Year of discovery: 1885 (Tombstone, USA), 1962 (Japan)

Locality list: 2 localities of emmonsite

• Fe₂Te₃O₉,2H₂O
• [Fe³⁺₂][(TeO₃)₃]^6-,2H₂O

• Class: Tellurite - Hydrate
• Soluble in: concentrated HCl, concentrated HNO₃, concentrated H₂SO₄

• Color: Yellowish green
• Streak: Pale yellow
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Prismatic

• Cleavage: Perfect on {010} (1 plane)
• Hardness: 5
• Density: 4.5

• System: Triclinic, Pseudocubic
• Group: (-1), P(-1)
• Lattice: a=7.9, b=8.0, c=7.6, α=96.7, β=95.0, γ=84.5