Pb(Ti,Fe,Mn)₂₁O₃₈

This sample of senaite is displayed in the Smithsonian Museum of Natural History. Senaite is an oxide mineral of lead, titanium, manganese, and iron with the composition Pb(Ti, Fe, Mn)₂₁O₃₈ . This sample is about 9x9 cm and is from Diamantina, Minas Gerais, Brazil.