Godovikovite Mineral Data

General Godovikovite Information

Chemical Formula: (NH4)(Al,Fe+++)(SO4)2 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 Empirical Formula: (NH₄)Al_0.75Fe³⁺_0.25(SO₄)₂ IMA Status: Approved IMA 1988 Locality: Kopeisk, Chelyabinsk Oblast', Urals Region, Russia Link to MinDat.org Location Data. Name Origin: Named for A. A. Godovikov. Name Pronunciation: Godovikovite + Pronunciation  

Godovikovite Image

Images:

Godovikovite Crystallography

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

Physical Properties of Godovikovite

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

Optical Properties of Godovikovite

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 Optical Data: Uniaxial (+), w=1.572, e=1.581, bire=0.0090.  

Calculated Properties of Godovikovite

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

Godovikovite Classification

Dana Class: 28.03.05.02 (28)Anhydrous Acid and Sulfates   (28.03)(A++) XO4   (28.03.05)Dana Group  

28.03.05.01 Sabieite (NH4)Fe(SO4)2 P 3₂1 3 2

 

28.03.05.02 Godovikovite (NH4)(Al,Fe)(SO4)2 P 3₂1 3 2

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

References: PHYS. PROP.(Am.Min.,Vol.75,p241,1990) OPTIC PROP.(Am.Min.,Vol.75,p241,1990) 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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