Zimbabweite

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Zimbabweite
General
Category Oxide minerals
Formula
(repeating unit)
(Na,K)2PbAs4(Nb,Ta,Ti)4O18
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 [1]

Zimbabweite is a mineral; formula (Na,K)2PbAs4(Nb,Ta,Ti)4O18.[1] 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.[1]

References[edit]