
1) Lead mineral 2) Orthorhombic mineral 3) Sodium mineral 4) Titanium mineral
Found on
https://www.crosswordclues.com/clue/zimbabweite

Zimbabweite is a mineral; formula (Na,K)2PbAs4(Nb,Ta,Ti)4O18. 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. ...
Found on
http://en.wikipedia.org/wiki/Zimbabweite
No exact match found.