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Warikahnite

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Formula:
Zn3(AsO4)2 · 2H2O
Colour:
Colourless to light yellow
Lustre:
Vitreous, Waxy
Crystal System:
Triclinic
Name:
Named after Walter Richard Kahn (22 April 1911 in Braunlage, Germany, † 14 May 2009 in Bad Bayersoien, Germany), dealer and collector specializing in Tsumeb minerals, for his financial support of research on secondary minerals and their crystal structures.
Note: Some "warikahnites" (yellow prisms associated with Cu-bearing adamite and olivenite sprays) recently (late 1980s and later) sold turned out to be willemites. This material is similar to that shown in http://www.mindat.org/photo-174225.html and http://www.mindat.org/photo-372025.html .


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Classification of WarikahniteHide

Approved
Approval Year:
1978
8.CA.35

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
40.3.1.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
20.3.5

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

Physical Properties of WarikahniteHide

Vitreous, Waxy
Transparency:
Transparent
Colour:
Colourless to light yellow

Optical Data of WarikahniteHide

Type:
Biaxial (+)
RI values:
nα = 1.747 nβ = 1.753 nγ = 1.768
2V:
Measured: 75° , Calculated: 66°
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v

Chemical Properties of WarikahniteHide

Formula:
Zn3(AsO4)2 · 2H2O

Crystallography of WarikahniteHide

Crystal System:
Triclinic
Cell Parameters:
a = 6.71 Å, b = 8.98 Å, c = 14.53 Å
α = 105.59°, β = 93.44°, γ = 108.68°
Ratio:
a:b:c = 0.747 : 1 : 1.618
Unit Cell V:
788.58 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.12 (6)
6.21 (8)
3.45 (7)
3.04 (6)
2.87 (8)
2.82 (10)
2.30 (7)

Type Occurrence of WarikahniteHide

Synonyms of WarikahniteHide

Other Language Names for WarikahniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Leiteite3 photos of Warikahnite associated with Leiteite on mindat.org.
Koritnigite1 photo of Warikahnite associated with Koritnigite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CA.ApexiteNaMg(PO4)·9H2OTric. 1 : P1
8.CA.05FransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OMon.
8.CA.05ParafransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OTric. 1 : P1
8.CA.10EhrleiteCa4Be3Zn2(PO4)6 · 9H2OTric. 1 : P1
8.CA.15FaheyiteBe2Mn2+Fe3+2(PO4)4 · 6H2OTrig. 3 2 : P31 2 1
8.CA.20GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2OTet. 4mm : I41md
8.CA.20MccrillisiteNaCs(Be,Li)Zr2(PO4)4 · 1-2H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.CA.20SelwyniteNaK(Be,Al)Zr2(PO4)4 · 2H2OTet.
8.CA.25PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2OIso. 2 3 : I2 3
8.CA.30HopeiteZn3(PO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.30ArsenohopeiteZn3(AsO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.40PhosphophylliteZn2Fe(PO4)2 · 4H2OMon. 2/m : P21/b
8.CA.45ParascholziteCaZn2(PO4)2 · 2H2OMon.
8.CA.45ScholziteCaZn2(PO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
8.CA.50KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2OMon. 2/m
8.CA.55PushcharovskiteK0.6Cu18(AsO4)(HAsO4)10(H2AsO4)4(OH)9.6·18.6H2OTric.
8.CA.60ProsperiteCa2Zn4(AsO4)4•H2O · Mon.
8.CA.65GengenbachiteKFe3+3(HPO4)4(H2PO4)2 · 6H2OTrig. 3m : P3 1c
8.CA.70ParahopeiteZn3(PO4)2 · 4H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.3.1AdamiteZn2(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
20.3.2ParadamiteZn2(AsO4)(OH)Tric. 1 : P1
20.3.3KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
20.3.4LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
20.3.6KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.3.7StranskiiteZn2Cu(AsO4)2Tric. 1 : P1
20.3.8Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2OMon.
20.3.9AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.3.10ProsperiteCa2Zn4(AsO4)4•H2O · Mon.
20.3.11GaititeCa2Zn(AsO4)2 · 2H2OTric.
20.3.12ZincroseliteCa2Zn(AsO4)2 · 2H2OMon.
20.3.13O'DanieliteNa(Zn,Mg)3H2(AsO4)3Mon. 2/m : B2/b
20.3.14JohilleriteNa(Mg,Zn)3Cu(AsO4)3Mon. 2/m : B2/b
20.3.15Holdenite(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8Orth. mmm (2/m 2/m 2/m) : Ccca
20.3.16Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2OTric.
20.3.17Chlorophoenicite(Mn,Mg)3Zn2(AsO4)(OH,O)6Mon. 2/m : B2/m
20.3.18LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
20.3.19Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1
20.3.20OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon.
20.3.21FahleiteCaZn5Fe3+2(AsO4)6 · 14H2OOrth.
20.3.22KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2OMon. 2/m

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 WarikahniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Neues Jahrbuch für Mineralogie, Monatshefte (1979), 389-395.
American Mineralogist (1980): 65: 408.

Internet Links for WarikahniteHide

Localities for WarikahniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
No reference listed
Lapis No.7/8 1999 p.70-74
        • Plaka
          • Plaka Mines
Min Rec 36:4 p 315
Namibia (TL)
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Min Rec 36:4 p 315
Mineral and/or Locality  
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