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Zimbabweite

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Formula:
(Na,K)2PbAs4(Ta,Nb,Ti)4O18
System:
Orthorhombic
Colour:
Yellow, yellow-brown
Lustre:
Adamantine
Hardness:
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

Approved 1984
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
8.7.10.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
23.11

23 : Arsenites
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Type Occurrence of Zimbabweite

Year of Discovery:
1984

Physical Properties of Zimbabweite

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°
Max Birefringence:
δ = 2.100
Image 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)2PbAs4(Ta,Nb,Ti)4O18
Essential elements:
All elements listed in formula:

Relationship of Zimbabweite to other Species

4.JA.05LeiteiteZn(As2O4)
4.JA.10ReineriteZn3(AsO3)2
4.JA.15KaribibiteFe2As4O9
4.JA.20KusachiiteCuBi2O4
4.JA.20SchafarzikiteFe2+Sb23+O4
4.JA.20TrippkeiteCu[As2O4]
4.JA.25ApuaniteFe2+Fe43+Sb43+O12S
4.JA.30VersiliaiteFe2Fe4Sb6O16S
4.JA.35SchneiderhöhniteFe2+Fe33+[As5O13]
4.JA.45LudlockitePbFe43+As103+O22
4.JA.50PaulmooreitePb2[As2O5]
4.JA.55StibivaniteSb2VO5
4.JA.60Chadwickite(UO2)[HAsO3]
23.2NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14
23.3LeiteiteZn(As2O4)
23.5Kuznetsovite(Hg2+)Hg2+(AsO4)Cl
23.6PaulmooreitePb2[As2O5]
23.7EcdemitePb6Cl4(As2O7)
23.8HeliophyllitePb6Cl4(As2O7)
23.9FinnemanitePb5(AsO3)3Cl
23.10GebharditePb8(As2O5)2OCl6
23.13RouseitePb2Mn2+[AsO3]2 · 2H2O
23.14FreediteCu+Pb8(AsO3)2O3Cl5
23.15ManganarsiteMn3(As2O4)(OH)4
23.17ArmangiteMn262+(AsO3)14(HAsO3)4(CO3)
23.18KaribibiteFe2As4O9
23.19SchneiderhöhniteFe2+Fe33+[As5O13]
23.20Lazarenkoite(Ca,Fe2+)Fe3+As33+O7 · 3H2O
23.21StenhuggariteCaFeSb(AsO3)2O
23.22Tomichite(V,Fe)4Ti3AsO13(OH)

Other Names for Zimbabweite

Name in Other Languages:

Other Information

Health Risks:
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

Localities for Zimbabweite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • Mashonaland West
    • Karoi District (Urungwe; Hurungwe District)
      • Mwami (Miami)
Foord, E.E.; Taggert jr., J.E.; Gaines, R.V.; Grubb, P. L.C & Kristiansen, R. (1986): Zimbabweite, a new alkali-lead-arsenic tantalate from St. Anns mine, Karoi District, Zimbabwe. Bulletin Minéralogie, 109: 331-336
Mineral and/or Locality  
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