Boulangerite
Pb₅Sb₄S₁₁
Sulfides
Hardness 2,75
· Monoclinic
Photo: Majzlan, Juraj, Daniel Ozdín, Jiří Sejkora, Gwladys Steciuk, Jakub Plášil, Christiane Rößler, and Christian Matthes · CC BY 4.0
Bi₅S₄
Named after Christian Andreas Zipser
Source: Wikidata
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