Mineralogy Database

Zykaite Mineral Data

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General Zykaite Information

Help on Chemical  Formula: Chemical Formula: Fe+++4(AsO4)3(SO4)(OH)•15(H2O)
Help on Composition: Composition: Molecular Weight = 1,023.45 gm
   Iron      21.83 %  Fe   31.21 % Fe2O3
   Arsenic   21.96 %  As   33.69 % As2O5
   Hydrogen   3.05 %  H    27.28 % H2O
   Sulfur     3.13 %  S     7.82 % SO3
   Oxygen    50.03 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+4(AsO4)3(SO4)(OH)•15(H2O)
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Kank, near Kutna Hora, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Vaclav Zyka (1926-), Czech geochemist.
Help on Name Pronunciation: Name Pronunciation: Zykaite Say ZYKAITE

Zykaite Image

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  Bukovskyite   Zykaite

Comments: Pale beige acicular crystals of bukovskýite with white zykaite.
Location: Christbescherung Mine, Großvoigtsberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

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Comments: Round aggregates of Zykaite.
Location: Reiche Zeche Mine, Freiberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 37 mm.
© Thomas Witzke / Abraxas-Verlag

Zykaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.965:1:5.2596
Help on Cell Dimensions: Cell Dimensions: a = 20.853, b = 7.033, c = 36.991, Z = 8; V = 5,425.07 Den(Calc)= 2.51
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.4(1), 10.6(0.7), 6.92(0.4),

Physical Properties of Zykaite

Help on Color: Color: Greenish white, Gray white.
Help on Density: Density: 2.5
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Zykaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2541,KPDmeas= 0.2551,KC= 0.2595
Ncalc = 1.65
Help on Optical Data: Optical Data: Biaxial (-), a=1.632, b=1.635-1.636, g=1.646, bire=0.0140, 2V(Calc)=56-66, 2V(Meas)=60.

Calculated Properties of Zykaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.47 gm/cc
note: Specific Gravity of Zykaite =2.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0051070204
Boson Index = 0.9948929796
Help on Photoelectric: Photoelectric: PEZykaite = 21.10 barns/electron
U=PEZykaite x rElectron Density= 52.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zykaite is Not Radioactive

Zykaite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.03)Pitticite Group Pitticite Hydrousferricarsenatesulfate(Fe,AsO4,SO4,H2O) None Zykaite Fe4(AsO4)3(SO4)(OH)•15(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 08.DB.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DB -With only medium-sized cations, (OH, etc.):RO4 < 1:1
08.DB.45 Zykaite Fe4(AsO4)3(SO4)(OH)•15(H2O) Unk Ortho

Other Zykaite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Zykaite :
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.DB.45





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