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Shafranovskite (Shafranovskit)

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Shafranovskit
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Shafranovskit
Olivgrüner bis gelblicher, feinkörnig-plattiger Shafranovskit; Fundort: Rasvumchorr, Chibiny-Massiv, Kola-Halbinsel, Russland; Bildbeite: 6 mm; Kristalline Partien bis 3 mm
Copyright: McSchuerf; Contribution: Mineralienatlas
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Rasvumchorr
Mineral: Shafranovskite
Image: 1095082562
Rating: 2 (votes: 2)
License: Usage for Mineralienatlas project only
Shafranovskit

Olivgrüner bis gelblicher, feinkörnig-plattiger Shafranovskit; Fundort: Rasvumchorr, Chibiny-Massiv, Kola-Halbinsel, Russland; Bildbeite: 6 mm; Kristalline Partien bis 3 mm

Copyright: McSchuerf
Contribution: Mineralienatlas 2004-09-13
Locality: Rasvumchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color gunkelgrün, olivgrün, gelbgrün
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages gut ausgebildet {0001}
Fracture muschelig
Solubility +++ Säuren, mit H2O aklakische Reaktion!
Crystal System trigonal, P31m

Chemism

Chemical formula

Na3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2·nH2O

Chemical composition

Eisen, Mangan, Natrium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 1098.81549869 u; Number of atoms in the formula: 58.75

Info

Empirical formula:

Na3K2(Mn0.6Fe0.3Na0.1)4[Si9(O0.75(OH)0.25)27](OH)2·nH2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.99

10.75

18.30

1.0079470

10.8354303

Oxygen

O

43.68

30

51.06

15.9994300

479.9829000

Sodium

Na

7.11

3.4

5.79

22.9897702

78.1652187

Silicon

Si

23.00

9

15.32

28.0855300

252.7697700

Potassium

K

7.12

2

3.40

39.0983100

78.1966200

Manganese

Mn

12.00

2.4

4.09

54.9380499

131.8513198

Iron

Fe

6.10

1.2

2.04

55.8452000

67.0142400

Analysis wt%

SiO2 : 47.52, Fe2O3 : 1.85, FeO : 6.10, MnO : 14.50, CaO : 0.61, Na2O : 10.24, K2O : 7.82, H2O : 9.78 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 82)

Strunz 9th edition incl. updates

9.EE.65

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
E: Einfache tetrahedrale Netze aus sechsfach-Ringen, verbunden über octahedrale Netze oder Bänder
65:Shafranovskit-Gruppe

Lapis Classification

VIII/H.40-030

VIII: SILIKATE
H: Schichtsilikate
40: Schichtsilikate mit Tetraeder-Doppelschichten und verwandte Strukturen

Classification by Hölzel

9.CA.530

9: SILICATES
C: Cyclosilicates
A: ~[Si3O9]6--Rings
5: Without Ti,Zr,Sn Walstromite-Group

Dana 8th edition

78.03.02.01

78: Unclassified Silicate Minerals
03: Unclassified silicates possible cyclosilicates

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gunkelgrün, olivgrün, gelbgrün

Streak color

weiß

Change in color

blassgelbgrün in dünnen Sektionen

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.017

Birefringence chart\! Shafranovskite title=Birefringence chart Shafranovskite

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

1.587

RI value γ / ε

1.570

Ri mean

1.581

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

157

Space Group

P31m

Cell parameters a (Å)

14.519

Cell parameters b (Å)

-

Cell parameters c (Å)

21.062

Cell parameters a/b or c/a

1.451

Cell parameters c/b

-

Z

6

Volume (ų)

3845.065

X-Ray Powder Diffraction

10.77(30),
10.54(100),
3.60(40),
3.51(70),
3.16(30),
2.975(50),
2.787(60),
2.674(30)

XRD chart Shafranovskite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.78 (berechnet) 2.76 - 2.78 (gemessen)

2.847 ( ρ calc. Mineralienatlas )

Cleavages

gut ausgebildet {0001}

Fracture

muschelig

Radioactivity

keine

Instability

+++ Säuren, mit H2O aklakische Reaktion!

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Rasvumchorr

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Karnasurt, Berg/Jubiläumspegmatit (Yubileinaya; Yubileinoye; Jubilejnaja)

Type material

Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russland

Mining Institute, St. Petersburg, 1202/1; Vernasdsky Geological Institute, Russland

A. E. Fersman Mineralogical Museum, Academy of Sciences, Moskau, Russland

Collection number of type material

5713/1 (Kola); 57772 (St. Peterbug); 81593 (Moskau)

Preface

Associations

Thermonatrit, Natrophosphat, Nacaphit, Olympit, Sidorenkit, Aegirin, Villiaumit, Phosinait, Rasvumit

Name from

Professor Ilarion Ilarionovich Shafranovskii (1907{1994), Mineraloge und Kristallograph am Bergbau-Institut, St. Petersburg, Russland

Author (Name, Year)

Khomyakov & Vrublevskaya & Zvyagin & Mateeva & Piloyan, 1982

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 111 (1982), 475

American Mineralogist 89 (2004), 1816

Other languages

German

Shafranovskit

Spanish

Shafranovskita

English

Shafranovskite

French

Shafranovskite

Russian

Шафрановскит

CNMNC (IMA)-Number

IMA 1981-048

CNMNC symbol

Symbol

Sfn

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 8sp4m0PL8kuqGq_acToUuQ
GUID (Global unique identifier) 9B78CAF2-CB43-4BF2-AA1A-AFDA713A14B9
Database ID 3491