Fülöppite is a rare member of the plagionite group, comprising heteromorphite Pb7Sb8S19, plagionite Pb5Sb8S17 and semseyite Pb9Sb8S21. It was named in 1929 for Dr. Béla Fülöpp (1863–1938), a Hungarian lawyer, statesman and mineral collector.
Fülöppite is a rare member of the plagionite group, comprising heteromorphite Pb7Sb8S19, plagionite Pb5Sb8S17 and semseyite Pb9Sb8S21. It was named in 1929 for Dr. Béla Fülöpp (1863–1938), a Hungarian lawyer, statesman and mineral collector.
== Structure == Fülöppite forms a homologous series with other members of the plagionite group. The structures of these minerals differ by the thickness of a galena sheet which occurs in all of them. Fülöppite has the thinnest such sheet.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).