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Zimbabweite

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About ZimbabweiteHide

Flag of Zimbabwe
Formula:
(Na,K)2PbAs4(Ta,Nb,Ti)4O18
Colour:
Yellow, yellow-brown
Lustre:
Adamantine
Hardness:
5 - 5½
Crystal System:
Orthorhombic
Name:
Named after its discovery locality, St. Ann's Mine, Karoi District, south of Miami, Zimbabwe.
An arsenite-tantalate.


Classification of ZimbabweiteHide

Approved
Approval Year:
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

Pronounciation of ZimbabweiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of ZimbabweiteHide

Adamantine
Colour:
Yellow, yellow-brown
Hardness:
5 - 5½ on Mohs scale

Optical Data of ZimbabweiteHide

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 ZimbabweiteHide

Formula:
(Na,K)2PbAs4(Ta,Nb,Ti)4O18
IMA Formula:
Na(Pb,Na,K)2(Ta,Nb,Ti)4As4O18

Crystallography of ZimbabweiteHide

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

Type Occurrence of ZimbabweiteHide

Reference:
Foord, E.E., Taggart, 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 de Minéralogie: 109: 331-336.

Synonyms of ZimbabweiteHide

Other Language Names for ZimbabweiteHide

Related Minerals - Nickel-Strunz GroupingHide

4.JA.05LeiteiteZn(As2O4)Mon. 2/m : P21/b
4.JA.10ReineriteZn3(AsO3)2Orth.
4.JA.15KaribibiteFe3+3(As3+O2)4(As3+2O5)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.JA.20KusachiiteCuBi2O4Tet.
4.JA.20SchafarzikiteFe2+Sb3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.20TrippkeiteCu2+As3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.25ApuaniteFe2+Fe3+4Sb3+4O12STet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.30VersiliaiteFe2Fe4Sb6O16SOrth.
4.JA.35SchneiderhöhniteFe2+Fe3+3As3+5O13Tric. 1 : P1
4.JA.45LudlockitePbFe3+4As3+10O22Tric. 1 : P1
4.JA.50PaulmooreitePb2[As2O5]Mon. 2/m : P21/b
4.JA.55StibivaniteSb2VO5Orth.
4.JA.60Chadwickite(UO2)[HAsO3]Tet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

23.2NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14Trig.
23.3LeiteiteZn(As2O4)Mon. 2/m : P21/b
23.5Kuznetsovite(Hg+2)Hg2+(AsO4)ClIso. 2 3 : P21 3
23.6PaulmooreitePb2[As2O5]Mon. 2/m : P21/b
23.7EcdemitePb6Cl4(As2O7)Tet.
23.8HeliophyllitePb6Cl4(As2O7)Orth.
23.9FinnemanitePb5(AsO3)3ClHex. 6/m : P63/m
23.10GebharditePb8(As2O5)2OCl6Mon.
23.13RouseitePb2Mn2+[AsO3]2 · 2H2OTric.
23.14FreediteCu+Pb8(AsO3)2O3Cl5Mon. 2/m : B2/m
23.15ManganarsiteMn3(As2O4)(OH)4
23.17ArmangiteMn2+26(AsO3)14(HAsO3)4(CO3)Trig. 3 : P3
23.18KaribibiteFe3+3(As3+O2)4(As3+2O5)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
23.19SchneiderhöhniteFe2+Fe3+3As3+5O13Tric. 1 : P1
23.20Lazarenkoite(Ca,Fe2+)Fe3+As3+3O7 · 3H2OOrth.
23.21StenhuggariteCaFeSb(AsO3)2OTet.
23.22Tomichite(V,Fe)4Ti3AsO13(OH)Mon.

Other InformationHide

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 ZimbabweiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Foord, E.E., Taggart, 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 de Minéralogie: 109: 331-336.
Duesler, E.N., Chakoumakos, B.C., Foord, E.E. (1988) Zimbabweite, Na(Pb,NaK)2As4(Ta,Nb,Ti)4O18, an arsenite-tantalate with a novel corner-linked octahedral sheet. American Mineralogist: 73: 1186-1190.
Jambor, J.L., Grew, E.S. (1990) New mineral names. American Mineralogist: 75: 240-246.

Internet Links for ZimbabweiteHide

Localities for ZimbabweiteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
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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