Chemistry:Zimbabweite
From HandWiki
| Zimbabweite | |
|---|---|
 Zimbabweite found at its only known locality worldwide | |
| General | |
| Category | Oxide minerals |
| Formula (repeating unit) | (Na,K) 2PbAs 4(Nb,Ta,Ti) 4O 18 |
| 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 |
| |re|er}} | Adamantine |
| References | [1] |
Zimbabweite is a yellow brown mineral with orthorhombic crystal habit and a hardness of 5, with formula (Na,K)
2PbAs
4(Nb,Ta,Ti)
4O
18.[1] 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.[1]
References
- ↑ 1.0 1.1 1.2 "Zimbabweite". 30 October 2023. https://www.mindat.org/min-4403.html.
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
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