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Godovikovite Mineral Data

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General Godovikovite Information

Help on Chemical  Formula: Chemical Formula: (NH4)(Al,Fe+++)(SO4)2
Help on Composition: Composition: Molecular Weight = 244.36 gm
   Aluminum   8.28 %  Al   15.65 % Al2O3
   Iron       5.71 %  Fe    8.17 % Fe2O3
   Hydrogen   1.65 %  H      -   % Calc as (NH4)2O
   Sulfur    26.24 %  S    65.53 % SO3
   Nitrogen   5.73 %  N    10.66 % (NH4)2O
   Oxygen    52.38 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)Al0.75Fe3+0.25(SO4)2
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Kopeisk, Chelyabinsk Oblast', Urals Region, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for A. A. Godovikov.
Help on Name Pronunciation: Name Pronunciation: Godovikovite + Pronunciation Say GODOVIKOVITE

Godovikovite Image

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Comments: A porous aggregate of massive yellow godovikovite.
Location: Carola Mine, Freital, Dresden, Saxony, Germany. Scale: Specimen size 4.2 cm.
© Thomas Witzke / Abraxas-Verlag

Godovikovite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.74736
Help on Cell Dimensions: Cell Dimensions: a = 4.75, c = 8.3, Z = 1; V = 162.18 Den(Calc)= 2.50
Help on Crystal System: Crystal System: Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: P 321
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.69(1), 2.921(0.9), 8.3(0.9),

Physical Properties of Godovikovite

Help on Color: Color: White, Colorless.
Help on Density: Density: 2.53
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Godovikovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.309 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.324 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2306,KPDmeas= 0.2279,KC= 0.1741
Ncalc = 1.44
Help on Optical Data: Optical Data: Uniaxial (+), w=1.572, e=1.581, bire=0.0090.

Calculated Properties of Godovikovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.55 gm/cc
note: Specific Gravity of Godovikovite =2.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEGodovikovite = 3.49 barns/electron
U=PEGodovikovite x rElectron Density= 8.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Godovikovite is Not Radioactive

Godovikovite Classification

Help on  Dana Class: Dana Class: (28)Anhydrous Acid and Sulfates
  (28.03)(A++) XO4
  (28.03.05)Dana Group Sabieite (NH4)Fe(SO4)2 P 321 3 2 Godovikovite (NH4)(Al,Fe)(SO4)2 P 321 3 2
Help on  Strunz Class: Strunz Class: 07.AC.20 07 - SULFATES (SELENATES, TELLURATES)
  07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O
  07.AC -With medium-sized and large cations
07.AC.20 Godovikovite (NH4)(Al,Fe)(SO4)2 P 321 3 2
07.AC.20 Sabieite (NH4)Fe(SO4)2 P 321 3 2

Other Godovikovite Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.75,p241,1990) OPTIC PROP.(Am.Min.,Vol.75,p241,1990)
Help on See Also: See Also: Links to other databases for Godovikovite :
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.AC.20





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