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Stepanovite

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Chai-Tumus coal deposits (Chaitumusuk coal Deposits), Lena River Basin, Bulun District, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
© 2008, JGW




Formula:
NaMgFe
3+
 
(C
 
2
O
 
4
)
 
3
 · 8-9H
 
2
O
System:TrigonalColour:Light green
Hardness:2
Name:Named after Pavel Ivanovich Stepanov (1880-1947), director Coal Geology Division, Institute of Geological Sciences (Moscow).
This page provides mineralogical data about Stepanovite.

Classification of Stepanovite

IMA status:Approved
Strunz 8th edition ID:9/A.01-80
Nickel-Strunz 10th (pending) edition ID:10.AB.20

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates
Dana 8th edition ID:50.1.7.1

50 : ORGANIC COMPOUNDS
1 : Oxalates
Hey's CIM Ref.:31.1.8

31 : Oxalates, Citrates, Mellitates and Acetates
1 : Oxalates
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Type Occurrence of Stepanovite

Type Locality:Tyllakh brown coal deposit, Lena River Basin, Bulun District, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
Year of Discovery:1953

Physical Properties of Stepanovite

Lustre:Vitreous
Colour:Light green
Hardness (Mohs):2

Crystallography of Stepanovite

Crystal System:Trigonal
Cell Parameters:a = 9.28Å, c = 36.67Å
Ratio:a:c = 1 : 3.952
Unit Cell Volume:V 2,734.88 ų (Calculated from Unit Cell)
Comment:Note: American Mineralogist (1964) 49, 442-443 says in a note: "data given for a:c and Z are inconsistent with the value a 9.28 kX; perhaps it is a typographical error for a 9,78 kX."

Optical Data of Stepanovite

Type:Uniaxial (-)
RI values: nω = 1.515 nε = 1.417
Maximum Birefringence:δ = 0.098

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Stepanovite

Formula:
NaMgFe
3+
 
(C
 
2
O
 
4
)
 
3
 · 8-9H
 
2
O
Essential elements:C, Fe, H, Mg, Na, O
All elements listed in formula:C, Fe, H, Mg, Na, O
Analytical Data:Readily soluble in water.
Relationship of Stepanovite to other Species
Related Minerals - Nickel-Strunz Grouping):

- + 
10.AB.05Humboldtine
Fe
2+
 
(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.05Lindbergite
Mn
2+
 
(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.10Glushinskite
Mg(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.15Moolooite
Cu(C
 
2
O
 
4
) · 0.4H
 
2
O
10.AB.25Minguzzite
K
 
3
Fe
3+
 
(C
 
2
O
 
4
)
 
3
 · 3H
 
2
O
10.AB.30Wheatleyite
Na
 
2
Cu(C
 
2
O
 
4
)
 
2
 · 2H
 
2
O
10.AB.35Zhemchuzhnikovite
NaMg(Fe
3+
 
,Al)(C
 
2
O
 
4
)
 
3
 · 8H
 
2
O
10.AB.40Weddellite
Ca(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.45Whewellite
Ca(C
 
2
O
 
4
) · H
 
2
O
10.AB.50Caoxite
Ca(C
 
2
O
 
4
) · 3H
 
2
O
10.AB.55Oxammite
(NH
 
4
)
 
2
(C
 
2
O
 
4
) · H
 
2
O
10.AB.60Natroxalate
Na
 
2
(C
 
2
O
 
4
)
10.AB.65Coskrenite-(Ce)
(Ce,Nd,La)
 
2
(C
 
2
O
 
4
)(SO
 
4
)
 
2
 · 12H
 
2
O
10.AB.70Levinsonite-(Y)
(Y,Nd,La)Al(C
 
2
O
 
4
)(SO
 
4
)
 
2
 · 12H
 
2
O
10.AB.75Zugshunstite-(Ce)
(Ce,Nd,La)Al(C
 
2
O
 
4
)(SO
 
4
)
 
2
 · 12H
 
2
O
10.AB.80Novgorodovaite
Ca
 
2
(C
 
2
O
 
4
)Cl
 
2
 · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- + 
31.1.1Oxammite
(NH
 
4
)
 
2
(C
 
2
O
 
4
) · H
 
2
O
31.1.2Moolooite
Cu(C
 
2
O
 
4
) · 0.4H
 
2
O
31.1.3Wheatleyite
Na
 
2
Cu(C
 
2
O
 
4
)
 
2
 · 2H
 
2
O
31.1.4Glushinskite
Mg(C
 
2
O
 
4
) · 2H
 
2
O
31.1.5Whewellite
Ca(C
 
2
O
 
4
) · H
 
2
O
31.1.6Weddellite
Ca(C
 
2
O
 
4
) · 2H
 
2
O
31.1.7Humboldtine
Fe
2+
 
(C
 
2
O
 
4
) · 2H
 
2
O
31.1.9Zhemchuzhnikovite
NaMg(Fe
3+
 
,Al)(C
 
2
O
 
4
)
 
3
 · 8H
 
2
O
31.1.10Minguzzite
K
 
3
Fe
3+
 
(C
 
2
O
 
4
)
 
3
 · 3H
 
2
O
Other Names for Stepanovite
Other Languages:
German:Stepanovit
Spanish:Stepanovita
Other Information
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Stepanovite
Reference List:

- + 
Nefedov, Y.L. (1953), Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 82: 311.



American Mineralogist (1964): 49: 442-443. [http://rruff.info/rruff_1.0/uploads/AM49_439.pdf; abstract; also with note on possibly misprinted cell parameter a]


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    • Localities for Stepanovite
    






    


    

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    Russia
     
    

    • Eastern-Siberian Region
    

      • Saha Republic (Sakha Republic; Yakutia)
    

        • Polar Yakutia
    

          • Bulun District
    

            • Lena River Basin
    
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    





Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    


      • Taymyrskiy Autonomous Okrug
    

        • Taimyr Peninsula
    

          • Putoran Plateau
    

            • Noril'sk
    
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