Mineralogy Database

Kankite Mineral Data

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General Kankite Information

Help on Chemical  Formula: Chemical Formula: Fe+++AsO4•3.5(H2O)
Help on Composition: Composition: Molecular Weight = 257.82 gm
   Iron      21.66 %  Fe   30.97 % Fe2O3
   Arsenic   29.06 %  As   44.57 % As2O5
   Hydrogen   2.74 %  H    24.46 % H2O
   Oxygen    46.54 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+(AsO4)•3.5(H2O)
Help on Environment: Environment: Found on the old (1200-1400) mine dumps.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: Kank, Kutno Hora district, Stredocesky Kraj, Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Kankite Say KANKITE

Kankite Image

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Comments: Greenish botryoidal aggregates of kankite.
Location: Reiche Zeche Mine, Freiberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Kankite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.075:1:0.4364
Help on Cell Dimensions: Cell Dimensions: a = 18.803, b = 17.49, c = 7.633, Z = 16; beta = 92.71° V = 2,507.42 Den(Calc)= 2.73
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.8(1), 4.764(0.34), 2.63(0.29),

Physical Properties of Kankite

Help on Color: Color: Yellow green.
Help on Density: Density: 2.7
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous - Dull

Optical Properties of Kankite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2462,KPDmeas= 0.2489,KC= 0.2529
Ncalc = 1.68 - 1.69
Help on Optical Data: Optical Data: Biaxial (?), a=1.664, g=1.68, bire=0.0160

Calculated Properties of Kankite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Kankite =2.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0048196964
Boson Index = 0.9951803036
Help on Photoelectric: Photoelectric: PEKankite = 25.79 barns/electron
U=PEKankite x rElectron Density= 68.06 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kankite is Not Radioactive

Kankite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.04)where A+++ XO4 � x(H2O)
  (40.04.04)Dana Group Kankite FeAsO4•3.5(H2O) Unk Mono
Help on  Strunz Class: Strunz Class: 08.CE.60 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CE -With only medium-sized cations, RO4:H2O � 1:2.5
08.CE.60 Kankite FeAsO4•3.5(H2O) Unk Mono

Other Kankite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Kankite :
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.CE.60





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