Stepanovite Mineral Data

General Stepanovite Information

Chemical Formula:

NaMgFe+++(C2O4)3•8-9(H2O)

Composition:

Molecular Weight = 520.33 gm

Sodium 4.42 % Na 5.96 % Na₂O

Magnesium 4.67 % Mg 7.75 % MgO

Iron 10.73 % Fe 15.35 % Fe₂O₃

Hydrogen 3.29 % H 29.43 % H₂O

Carbon 13.85 % C 41.52 % C₂O₃

Oxygen 63.03 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaMgFe³⁺(C₂O₄)₃•8.5(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1953

Locality:

Tyllakh coal deposit, Lena River, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Namde for Pavel Ivanovich Stepanov (1880-1047), Russian geologist.

Name Pronunciation:

Stepanovite + Pronunciation

Stepanovite Image

Images:

Stepanovite

Comments: Translucent yellow crystalline stepanovite fragment.
Location: Chai-Tumus, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stepanovite Crystallography

Axial Ratios:

a:c = 1:3.72662

Cell Dimensions:

a = 9.84, c = 36.67, Z = 6; V = 3,074.91 Den(Calc)= 1.69

Crystal System:

Trigonal Space Group: Unk

Physical Properties of Stepanovite

Cleavage:

None

Color:

Green, Yellow green.

Density:

1.69

Diaphaneity:

Transparent to Translucent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Water Soluble - Water soluble mineral.

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Optical Properties of Stepanovite

Dichroism (e):

colorless.

Dichroism (w):

yellowish green.

Gladstone-Dale:

CI meas= -0.574 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.574 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2757,KPDmeas= 0.2757,KC= 0.1752
Ncalc = 1.3

Optical Data:

Uniaxial (-), e=1.417, w=1.515, bire=0.0980.

Calculated Properties of Stepanovite

Electron Density:

Bulk Density (Electron Density)=1.73 gm/cc
note: Specific Gravity of Stepanovite =1.69 gm/cc.

Fermion Index:

Fermion Index = 0.0087774735
Boson Index = 0.9912225265

Photoelectric:

PE_Stepanovite= 3.47 barns/electron
U=PE_Stepanovite x rElectron Density= 6.00 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stepanovite is Not Radioactive

Stepanovite Classification

Dana Class:

50.01.07.01 (50)Salts of Organic Acids

(50.01)(Oxalates)

(50.01.07)Stepanovite Group

50.01.07.01 Stepanovite NaMgFe(C2O4)3•8-9(H2O) Unk Trig

50.01.07.02 Zhemchuzhnikovite NaMg(Al,Fe)(C2O4)3•8(H2O) Unk Trig

Strunz Class:

10.AB.20 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AB -Oxalates

10.AB.20 Stepanovite NaMgFe(C2O4)3•8-9(H2O) Unk Trig

Other Stepanovite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Stepanovite :
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 Stepanovite Specimen Label here :

Stepanovite

NaMgFe+++(C2O4)3•8-9(H2O)
Dana No: 50.01.07.01 Strunz No: 10.AB.20
Locality:

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