Mineralogy Database

Slavikite Mineral Data

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General Slavikite Information

Help on Chemical  Formula: Chemical Formula: NaMg2Fe+++5(SO4)7(OH)6•33(H2O)
Help on Composition: Composition: Molecular Weight = 1,719.83 gm
   Sodium      1.34 %  Na    1.80 % Na2O
   Magnesium   2.83 %  Mg    4.69 % MgO
   Iron       16.24 %  Fe   23.21 % Fe2O3
   Hydrogen    4.22 %  H    37.71 % H2O
   Sulfur     13.05 %  S    32.59 % SO3
   Oxygen     62.33 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaMg2Fe3+5(SO4)7(OH)6•33(H2O)
Help on Environment: Environment: Formed as a weathering product of pyritic shales. Found with other acid (low pH) sulfates.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1926
Help on Locality: Locality: Valachov Hill, near Skrivany, Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Czech mineralogist, Frantisek Slavik (1876-1957).
Help on Name Pronunciation: Name Pronunciation: Slavikite + Pronunciation Say SLAVIKITE
Help on Synonym: Synonym: ICSD 4303
  PDF 20-679

Slavikite Image

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Comments: Bubbly slavikite crust.
Location: Smolnicka Huta, Vychodoslovensky, Slovakia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Slavikite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.8795
Help on Cell Dimensions: Cell Dimensions: a = 12.2, c = 35.13, Z = 3; V = 4,528.23 Den(Calc)= 1.89
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.04(1), 5.83(0.8), 11.7(0.8),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 2 0 5) ( 1 0 1) ( 0 2 1) ( 0 5 2) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Slavikite

Help on Color: Color: Yellowish green.
Help on Density: Density: 1.9 - 2.1, Average = 2
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale yellowish green

Optical Properties of Slavikite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): lemon yellow.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.062 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2697,KPDmeas= 0.2549,KC= 0.2718
Ncalc = 1.51 - 1.57
Help on Optical Data: Optical Data: Uniaxial (-), e=1.497-1.506, w=1.506-1.53, bire=0.0090-0.0240.

Calculated Properties of Slavikite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Slavikite =1.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0075528899
Boson Index = 0.9924471101
Help on Photoelectric: Photoelectric: PESlavikite = 5.58 barns/electron
U=PESlavikite x rElectron Density= 10.86 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Slavikite is Not Radioactive

Slavikite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09)where (A+ B++) (XO4) Zq�x(H2O)
  (31.09.13)Dana Group Slavikite NaMg2Fe5(SO4)7(OH)6•33(H2O) R 3 3
Help on  Strunz Class: Strunz Class: 07.DF.30 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DF -With large and medium-sized cations
07.DF.30 Slavikite NaMg2Fe5(SO4)7(OH)6•33(H2O) R 3 3

Other Slavikite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Slavikite :
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: 07.DF.30





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