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Boyleite

Year of discovery: 1978 (Porphyry quarry, Germany), 1981 (Japan)

Locality list: 2 localities of boyleite

• ZnSO₄,4H₂O
• (Zn,Mg)SO₄,4H₂O
• [Zn²⁺][SO₄]^2-,4H₂O

• Class: Rozenite group
• Class: Sulfate - Hydrate
• Soluble in: Water
• Formed on dehydration of Zincmelanterite
• Dehydrate to Gunningite slowly under dry condition.

• Zn => Co: Aplowite
• Zn => Fe: Rozenite
• Zn => Mn: Ilesite
• Zn => Mg: Starkeyite

• 4H₂O => H₂O: Gunningite
• 4H₂O => 6H₂O: Bianchite
• 4H₂O => 7H₂O: Zincmelanterite, Goslarite

• Color: White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: No
• Hardness: 2
• Density: 2.4

• System: Monoclinic
• Group: 2/m, P2₁/n
• Lattice: a=5.9, b=13.6, c=8.0, β=90.4