Zimbabweite
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| Zimbabweite | |
|---|---|
 Zimbabweite found at its only known locality worldwide | |
| General | |
| Category | Oxide minerals |
| Formula | (Na,K)2PbAs4(Nb,Ta,Ti)4O18 |
| IMA symbol | Zbb[1] |
| Strunz classification | 4.JA.40 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Ccmb |
| Unit cell | a = 12.23 Å, b = 15.29 Å c = 8.66 Å, Z = 4 |
| Identification | |
| Color | Yellow, yellow-brown |
| Luster | Adamantine |
| References | [2] |
Zimbabweite is a yellow brown mineral with orthorhombic crystal habit and a hardness of 5, with formula (Na,K)2PbAs4(Nb,Ta,Ti)4O18.[2] It is generally classed as an arsenite but is notable for also containing niobium and tantalum. It was discovered in 1986 in kaolinized pegmatite, i.e. weathered to clay, in Zimbabwe.[2]
References
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