Mineralogy Database

Warikahnite Mineral Data

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General Warikahnite Information

Help on Chemical  Formula: Chemical Formula: Zn3(AsO4)2•2(H2O)
Help on Composition: Composition: Molecular Weight = 510.04 gm
   Zinc      38.46 %  Zn   47.87 % ZnO
   Arsenic   29.38 %  As   45.06 % As2O5
   Hydrogen   0.79 %  H     7.06 % H2O
   Oxygen    31.37 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn3(AsO4)2•2(H2O)
Help on Environment: Environment: Secondary arsenate mineral in zinc-bearing ore deposit.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Tsumeb mine, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Walter Richard Kahn, collector of Tsumeb minerals, Bayersoien, Germany.
Help on Name Pronunciation: Name Pronunciation: Warikahnite + Pronunciation Say WARIKAHNITE
Help on Synonym: Synonym: ICSD 100347
  PDF 33-1468

Warikahnite Image

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Comments: Divergent, acicular aggregate of yellowish, brownish orange warikahnite crystals on a white quartz matrix. William Pinch collection. Featured on the cover of the Mineralogical Record, 36:4..
Location: "O" stope, 31st level, Tsumeb mine, Namibia.. Scale: 3 x 4.9 cm.
© Jeff Scovil

Warikahnite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7464:1:1.6189
Help on Cell Dimensions: Cell Dimensions: a = 6.71, b = 8.989, c = 14.553, Z = 4; alpha = 105.59°, beta = 93.44°, gamma = 108.68° V = 799.51 Den(Calc)= 4.24
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.82(1), 2.87(0.8), 6.21(0.8),

Physical Properties of Warikahnite

Help on Cleavage: Cleavage: {001} Perfect, {010} Good, {100} Good
Help on Color: Color: Colorless, Honey yellow, Light yellow, Orange.
Help on Density: Density: 4.24
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Warikahnite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1766,KPDmeas= 0.1783,KC= 0.1727
Ncalc = 1.73 - 1.74
Help on Optical Data: Optical Data: Biaxial (+), a=1.747, b=1.753, g=1.768, bire=0.0210, 2V(Calc)=66, 2V(Meas)=75.

Calculated Properties of Warikahnite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Warikahnite =4.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEWarikahnite = 39.76 barns/electron
U=PEWarikahnite x rElectron Density= 160.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Warikahnite is Not Radioactive

Warikahnite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.03)where (A++)3 (XO4)2 � x(H2O)
  (40.03.01)Dana Group Warikahnite Zn3(AsO4)2•2(H2O) P1 1
Help on  Strunz Class: Strunz Class: 08.CA.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CA -With small and large/medium cations
08.CA.35 Warikahnite Zn3(AsO4)2•2(H2O) P1 1

Other Warikahnite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Warikahnite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.CA.35





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