What is "zimbabweite"

n. (context mineralogy English) A yellow-brown mineral with chemical formula (Na,K)₂PbAs₄(Nb,Ta,Ti)₄O₁₈, generally classed as an arsenite.

Zimbabweite is a mineral; formula (Na,K)PbAs(Nb,Ta,Ti)O. It is generally classed as an arsenite but is notable for also containing niobium and tantalum. A yellow brown mineral with orthorhombic crystal habit and a hardness of 5. It was discovered in 1986 in kaolinized pegmatite, i.e. weathered to clay, in Zimbabwe.