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Zimbabweite

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St Anne's Mine (St Anne Mine; St Anns Mine), Mwami, Karoi (Urungwe; Hurungwe) District, Mashonaland West, Zimbabwe
© Caltech

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Formula:
(Na,K)
 
2
PbAs
 
4
(Ta,Nb,Ti)
 
4
O
 
18
System:OrthorhombicColour:Yellow, yellow-brown
Lustre:AdamantineHardness:5 - 5½
Name:Named after its discovery locality, St. Ann's Mine, Karoi District, south of Miami, Zimbabwe.
This page provides mineralogical data about Zimbabweite.

Classification of Zimbabweite

IMA status:Approved 1984
Strunz 8th edition ID:4/J.04-10
Nickel-Strunz 10th (pending) edition ID:4.JA.40

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
A : Arsenites, antimonites, bismuthites; without additional anions, without H2O
Dana 8th edition ID:8.7.10.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
Hey's CIM Ref.:23.11

23 : Arsenites
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Type Occurrence of Zimbabweite

Type Locality:St Anne's Mine (St Anne Mine; St Anns Mine), Mwami, Karoi (Urungwe; Hurungwe) District, Mashonaland West, Zimbabwe
Year of Discovery:1986

Physical Properties of Zimbabweite

Lustre:Adamantine
Colour:Yellow, yellow-brown
Hardness (Mohs):5 - 5½

Crystallography of Zimbabweite

Crystal System:Orthorhombic
Cell Parameters:a = 12.23Å, b = 15.29Å, c = 8.66Å
Ratio:a:b:c = 0.8 : 1 : 0.566
Unit Cell Volume:V 1,619.39 ų (Calculated from Unit Cell)

Optical Data of Zimbabweite

Type:Biaxial (+)
RI values: nα = 2.100
2V:Measured: 80°
Maximum Birefringence:δ = 2.100

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v extreme

Chemical Properties of Zimbabweite

Formula:
(Na,K)
 
2
PbAs
 
4
(Ta,Nb,Ti)
 
4
O
 
18
Essential elements:As, Na, O, Pb, Ta
All elements listed in formula:As, K, Na, Nb, O, Pb, Ta, Ti

Relationship of Zimbabweite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JA.05Leiteite
Zn[As
 
2
O
 
4
]
4.JA.10Reinerite
Zn
 
3
(AsO
 
3
)
 
2
4.JA.15Karibibite
Fe
 
2
As
 
4
O
 
9
4.JA.20Kusachiite
CuBi
 
2
O
 
4
4.JA.20Schafarzikite
Fe
2+
 
Sb
3+
2
O
 
4
4.JA.20Trippkeite
Cu[As
 
2
O
 
4
]
4.JA.25Apuanite
Fe
2+
 
Fe
3+
4
Sb
3+
4
O
 
12
S
4.JA.30Versiliaite
Fe
 
2
Fe
 
4
Sb
 
6
O
 
16
S
4.JA.35Schneiderhöhnite
Fe
2+
 
Fe
3+
3
[As
 
5
O
 
13
]
4.JA.45Ludlockite
PbFe
3+
4
As
3+
10
O
 
22
4.JA.50Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
4.JA.55Stibivanite
Sb
 
2
VO
 
5
4.JA.60Chadwickite
(UO
 
2
)[HAsO
 
3
]
Related Minerals - Hey's Index Grouping:

- +
23.2Nanlingite
NaCa
 
6
(Mg,Fe,Li)
 
12
(AsO
 
3
)
 
2
[Fe(AsO
 
3
)
 
6
]F
 
14
·
23.3Leiteite
Zn[As
 
2
O
 
4
]
23.5Kuznetsovite
(Hg-Hg)Hg
2+
 
[Cl|AsO
 
4
]
23.6Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
23.7Ecdemite
Pb
 
6
[As
 
2
O
 
7
|Cl
 
4
]
23.8Heliophyllite
Pb
 
3
AsO
 
4-n
Cl
 
2n+1
23.9Finnemanite
Pb
 
5
[Cl|(AsO
 
3
)
 
3
]
23.10Gebhardite
Pb
 
8
[O|Cl
 
6
|(As
 
2
O
 
5
)
 
2
]
23.13Rouseite
Pb
 
2
Mn
2+
 
[AsO
 
3
]
 
2
 · 2H
 
2
O
23.14Freedite
Pb
 
15
(Cu,Fe
2+
 
)
 
3
[O
 
7
|Cl
 
10
|(AsO
 
3
)
 
4
]
23.15Manganarsite
Mn
 
3
[(OH)
 
4
|As
 
2
O
 
4
]
23.17Armangite
Mn
2+
26
[CO
 
3
|(HAsO
 
3
)
 
4
|(AsO
 
3
)
 
14
]
23.18Karibibite
Fe
 
2
As
 
4
O
 
9
23.19Schneiderhöhnite
Fe
2+
 
Fe
3+
3
[As
 
5
O
 
13
]
23.20Lazarenkoite
(Ca,Fe)FeAs
 
3
O
 
7
·3H
 
2
O
23.21Stenhuggarite
CaFeSbO(AsO
 
3
)
 
2
23.22Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
OH

Other Names for Zimbabweite

Synonyms:
IMA1984-034
Other Languages:
German:Zimbabweit
Russian:Зимбабвеит
Spanish:Zimbabweita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Zimbabweite

Reference List:Bulletin de la Société française de Minéralogie et de Cristallographie (1986): 106: 331-336.

American Mineralogist (1988): 73: 1186-1190.

American Mineralogist (1990): 75: 244.

Internet Links for Zimbabweite

Search Engines:
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  • Look for Zimbabweite on Wikipedia
  • Look for Zimbabweite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Zimbabweite in the Natural History Museum (London) online catalogue
  • Zimbabweite details from Handbook of Mineralogy (PDF)
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    Localities for Zimbabweite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Zimbabwe
     
    • Mashonaland West
      • Karoi (Urungwe; Hurungwe) District
        • Mwami
    		Bull.Min.(1986) 106, 331-336
    Mineral and/or Locality
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