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

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

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 - Trapezohedral H-M Symbol (3 2) Space Group: P 3₂1

$Help on X Ray Diffraction:$ 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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Print or Cut-and-Paste your Godovikovite Specimen Label here :

Godovikovite

(NH4)(Al,Fe+++)(SO4)2
Dana No: 28.03.05.02 Strunz No: 07.AC.20
Locality:

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