Wodginite is a manganese, tin, tantalum oxide mineral with the chemical formula Mn2+Ta2O8. It may also include significant amounts of niobium.

Tapiolite is a black mineral series that is an ore of niobium and tantalum. The tapiolite group includes tapiolite- or ferrotapiolite and tapiolite- or manganotapiolite. Tapiolite- is by far the more