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Gratianite

Year of discovery: 2009 (Baita Bihor skarn, Rumania), 2017 (Japan)

Locality list: A locality of gratianite

• MnBi₂S₄
• (Mn,Fe)Bi₂S₄
• [][Bi³⁺₂Mn²⁺][S₄]^8-

• Class: Pavonite group < Large 2D fragment Pb sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Mn => Hg: Grumiplucite
• Mn => Cd: Kudriavite

• Bi => Sb: Clerite

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=12.7, b=3.9, c=14.8, β=115.3