Boulangerite
Pb₅Sb₄S₁₁
Sulfides
Hardness 2,75
· Monoclinic
Photo: Sejkora, Jiri, Cristian Biagioni, and Emil Makovicky · CC BY 4.0
Ag₅Bi₁₃Se₂₂
Named after selenium
Source: Wikidata
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