Zimbabweite

Zimbabweite
Zimbabweite
	Zimbabweite found at its only known locality worldwide
General
Category	Oxide minerals
Formula; (repeating unit)	(Na,K)2PbAs4(Nb,Ta,Ti)4O18
IMA symbol	Zbb
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

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

^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
^ ^a ^b ^c "Zimbabweite". Mindat.org. 30 October 2023.

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[1] Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.

[Mindat-2] "Zimbabweite". Mindat.org. 30 October 2023.

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