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Stepanovite

Additional Functions

Collectors Summary

Color grün, gelbgrün
Hardness (Mohs) 2
Solubility +++ H2O
Crystal System trigonal,

Chemism

Chemical formula

NaMgFe3+(C2O4)3·8-9H2O

Chemical composition

Eisen, Magnesium, Natrium, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 520.3281242 u; Number of atoms in the formula: 46.5

Info

Empirical formula:

NaMgFe(C2O4)3·8.5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.29

17

36.56

1.0079470

17.1350990

Carbon

C

13.85

6

12.90

12.0107800

72.0646800

Oxygen

O

63.03

20.5

44.09

15.9994300

327.9883150

Sodium

Na

4.42

1

2.15

22.9897702

22.9897702

Magnesium

Mg

4.67

1

2.15

24.3050600

24.3050600

Iron

Fe

10.73

1

2.15

55.8452000

55.8452000

Strunz 9th edition incl. updates

10.AB.20

10: Organische Verbindungen
A: Salze organischer Säuren
B: Oxalate
20:Stepanovit-Gruppe

Lapis Classification

IX/A.01-080

IX: ORGANISCHE VERBINDUNGEN
A: Salze organischer Säuren
1: Oxalate [C2O4] 2-

Classification by Hölzel

A.AA.300

A: ORGANIC COMPLEXES
A: Carbonacids and their Salts
A: Oxalates

Hey's Chemical Index of Minerals

31.01.08

31: Oxalates, Citrates, Mellitates and Acetates
01: Oxalates

Dana 8th edition

50.01.07.01

50: Organic Minerals
01: Salts of Organic Acids (Oxalates)
07: Stepanovite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grün, gelbgrün

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.098

Birefringence chart\! Stepanovite title=Birefringence chart Stepanovite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.515

RI value γ / ε

1.417

Ri mean

1.482

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Cell parameters a (Å)

9.83

Cell parameters b (Å)

-

Cell parameters c (Å)

36.67

Cell parameters a/b or c/a

3.730

Cell parameters c/b

-

Z

6

Volume (ų)

3068.659

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.69

1.689 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Sacha (Sakha, Jakutien, Якутия), Republik/Bulunsky (Bulun), Rajon/Lena, Fluss/Tyllakh, Braunkohle-Lagerstätte

Type material

Bergbauinstitut St. Petersburg, Russland, Inventarnr. 1659/1

Collection number of type material

1659/1

Preface

Name from

Pavel Ivanovich Stepanov (1880–1947), Geologe, hat gearbeitet über die Geologie von Kohlelagerstätten

Author (Name, Year)

Nefedov, 1953

Collector information

extrem selten, nachgewiesen in Bohrkernen aus dem Permafrostbereich, Tiefe bis 230 m; die Kohle ist dort mit natürlicher Essigsäure gesättigt (Knipovich et al., 1963)

References

Nefedov, Y.I. in: V.A. Mokievsky, The scientific session of the Federov Institute together with the All-Union Mineralogical Society. Zap. Vses. Mineral. Obshch. 82 (1953) S. 311–317. (in russischer Sprache). Abstract in Amer. Mineral. 40 (1955) S. 551.
Knipovich, Y.N., A.I. Komkov, E.I. Nefedov: On stepanovite and the new mineral zhemchuzhnikovite. Trudy. Vses. Nauchno-Issled. Geol. Inst. 96 (1963) S. 131–135. (in russischer Sprache). Abstract in Amer. Mineral. 49 (1964) S. 442.
Pekov, I.V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow, S. 194.
Igor Huskić, Igor V. Pekov, Sergey V. Krivovichev, Tomislav Friščić: Minerals with metal-organic framework structures. Science Advances Vol.2, Nr. 8 (2016) S.1-7. DOI: 10.1126/sciadv.1600621

Other languages

German

Stepanovit

Spanish

Stepanovita

French

Stepanovite

English

Stepanovite

Russian

Степановит

Alternative Name

German

Stepanowit

CNMNC symbol

Symbol

Stpn

IDs

GUSID (Global unique identifier short form) T11GQ75XCk25vrnxFWn2kg
GUID (Global unique identifier) 43465D4F-57BE-4D0A-B9BE-B9F11569F692
Database ID 3620