Stepanovite Mineral Data

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.

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:

TrigonalSpace Group: Unk

Physical Properties of Stepanovite

Cleavage:

None

Color:

Green, Yellow green.

Density:

1.69

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Stepanovite

Electron Density:

r_electron=1.73 gm/cc
note: r_Stepanovite=1.69 gm/cc.

Fermion Index

Fermion Index = 0.00877
Boson Index = 0.99123

Photoelectric:

PE_Stepanovite= 3.47 barns/electron
U=PE_Stepanovite x r_electron= 6.00 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stepanovite is Not Radioactive

Stepanovite Classification

Dana Class:

50.1.7.1 (50)Salts of Organic Acids

(50.1)(Oxalates)

(50.1.7)Dana Group

50.1.7.1 Stepanovite NaMgFe(C2O4)3·8-9(H2O) Unk Trig

50.1.7.2 Zhemchuzhnikovite NaMg(Al,Fe)(C2O4)3·8(H2O) Unk Trig

Strunz Class:

IX/A.01-80 IX - Organic compunds

IX/A - Oxalates. Salts from organic acids. [C2O4]2- arranged after increasing cation size

IX/A.01 - Whewellite - Wheatleyite series

IX/A.01-05 Natroxalate! Na2C2O4 P 2₁/a 2/m

IX/A.01-10 Whewellite Ca(C2O4)·(H2O) P 2₁/n 2/m

IX/A.01-20 Weddellite Ca(C2O4)·2(H2O) I 4/m 4/m

IX/A.01-25 Caoxite! Ca(C2O4)·3(H2O) P1 1

IX/A.01-28 Novgorodovaite! Ca2(C2O4)Cl2·2(H2O) I2/m 2/m

IX/A.01-30 Oxammite (NH4)2(C2O4)·(H2O) P 2₁2₁2 2 2 2

IX/A.01-40 Glushinskite Mg(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-50 Humboldtine Fe(C2O4)·2(H2O) I2/a 2/m

IX/A.01-55 Lindbergite! Mn(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-60 Minguzzite K3Fe(C2O4)3·3(H2O) P 2₁/c 2/m

IX/A.01-70 Zhemchuzhnikovite NaMg(Al,Fe)(C2O4)3·8(H2O) Unk Trig

IX/A.01-80 Stepanovite NaMgFe(C2O4)3·8-9(H2O) Unk Trig

IX/A.01-90 Moolooite Cu(C2O4)·n(H2O)(n<1) Unk Ortho

IX/A.01-100 Wheatleyite Na2Cu(C2O4)2·2(H2O) P1 1

IX/A.01-110 Coskrenite-(Ce)! (Ce,Nd,La)2(SO4)2(C2O4)·8(H2O) C 2/c 2/m

IX/A.01-120 Levinsonite-(Y)! (Y,Nd,La)Al(SO4)2(C2O4)·12(H2O) P 2/n 2/m

IX/A.01-130 Zugshunstite-(Ce)! (Ce,Nd,La)Al(SO4)2(C2O4)·8(H2O) C 2/c 2/m

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Stepanovite Specimen Label here :

Stepanovite

NaMgFe+++(C2O4)3·8-9(H2O)
Dana No: 50.1.7.1 Strunz No: IX/A.01-80
Locality:

Notes: