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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 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

Volumne (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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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English pages

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American-Mineralogist-Crystal-Structure-Database - search for: Shafranovskite
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Russian pages

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German pages

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