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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
© R.Kristiansen

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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
NaMg
 
4
(AsO
 
3
)
 
2
F
 
4
23.3Leiteite
Zn(As
 
2
O
 
4
)
23.5Kuznetsovite
(Hg
+
2
)Hg
2+
 
(AsO
 
4
)Cl
23.6Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
23.7Ecdemite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
23.8Heliophyllite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
23.9Finnemanite
Pb
 
5
(AsO
 
3
)
 
3
Cl
23.10Gebhardite
Pb
 
8
(As
 
2
O
 
5
)
 
2
OCl
 
6
23.13Rouseite
Pb
 
2
Mn
2+
 
[AsO
 
3
]
 
2
 · 2H
 
2
O
23.14Freedite
Cu
+
 
Pb
 
8
(AsO
 
3
)
 
2
O
 
3
Cl
 
5
23.15Manganarsite
Mn
 
3
(As
 
2
O
 
4
)(OH)
 
4
23.17Armangite
Mn
2+
26
(AsO
 
3
)
 
14
(HAsO
 
3
)
 
4
(CO
 
3
)
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
CaFeSb(AsO
 
3
)
 
2
O
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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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Zimbabweite details from Handbook of Mineralogy (PDF)
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    • Localities for Zimbabweite

    Hide Locality List
    (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
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 13:37:17
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