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Mallardite

Year of discovery: 1926 (Lucky Boy mine, USA), 1978 (Japan)

Locality list: A locality of mallardite

• MnSO₄,7H₂O
• [Mn(H₂O)₆]²⁺[SO₄]^2-,H₂O

• Class: Melanterite group
• Class: Sulfate - Hydrate
• Soluble in: Water
• Dehydrates to Jôkokuite (Jokokuite).

• Mn => Mg: Epsomite, Alpersite
• Mn => Zn: Zincmelanterite, Goslarite
• Mn => Fe: Melanterite
• Mn => Cu: Boothite
• Mn => Co: Bieberite
• Mn => Ni: Morenosite

• 7H₂O => H₂O: Szmikite
• 7H₂O => 4H₂O: Ilesite
• 7H₂O => 5H₂O: Jôkokuite (Jokokuite)
• 7H₂O => 6H₂O: Chvaleticeite

• Color: Pale pink, Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Good on {001} (1 plane)
• Hardness: 2
• Density: 1.8

• System: Monoclinic
• Group: 2/m, P2₁/c
• Lattice: a=14.2, b=6.5, c=11.1, β=105.6