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Sitinakite (Sitinakit)

Pictures (2 Images total)

Sitinakit
Views (File:
1360596612
): 533
Sitinakit
Bildbreite: 4 mm, Fundort: Koashva, Khibiny, Kola-Halbinsel, Murmansk, Russland
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Berg Koashva/Koashva Grube
Mineral: Sitinakite
Image: 1360596612
License: Usage for Mineralienatlas project only
Sitinakit

Bildbreite: 4 mm, Fundort: Koashva, Khibiny, Kola-Halbinsel, Murmansk, Russland

Copyright: Luigi Chiappino
Contribution: thdun5 2013-02-11
Locality: Koashva Grube / Berg Koashva / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Sitinakit
Views (File:
1458905743
): 317
Sitinakit
von Kukisvumchorr im Gibiny Massiv, Kola Halbinsel, Murmansk, Russland; eingewachsene gelbe faserige Partien (nicht analysiert); BB = 2,6 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A037354, Donator: anatase2
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kukisvumchorr
Mineral: Sitinakite
Image: 1458905743
License: Usage for Mineralienatlas project only
Sitinakit (SNr: A037354)

von Kukisvumchorr im Gibiny Massiv, Kola Halbinsel, Murmansk, Russland; eingewachsene gelbe faserige Partien (nicht analysiert); BB = 2,6 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2016-03-25
Locality: Kukisvumchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos, hellbraun, rosa
Streak color weiß
Hardness (Mohs) 4.75
Cleavages vollkommen {100} und teilbar {001}
Fracture treppenartig
Solubility - verdünnte Säuren
Crystal System tetragonal, P42/mcm

Chemism

Chemical formula

Na2K(Ti,Nb)4O4(SiO4)2(O,OH)·4H2O

Chemical composition

Natrium, Niob, Silicium, Titan, Kalium, Sauerstoff, Wasserstoff

Unit weight: 658.06246515 u; Number of atoms in the formula: 34.25

Info

Empirical formula:

Na2K(Ti0.75Nb0.25)4O4(SiO4)2(O0.75(OH)0.25)·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.26

8.25

24.09

1.0079470

8.3155628

Oxygen

O

41.33

17

49.64

15.9994300

271.9903100

Sodium

Na

6.99

2

5.84

22.9897702

45.9795404

Silicon

Si

8.54

2

5.84

28.0855300

56.1710600

Potassium

K

5.94

1

2.92

39.0983100

39.0983100

Titanium

Ti

21.82

3

8.76

47.8671000

143.6013000

Niobium

Nb

14.12

1

2.92

92.9063820

92.9063820

Analysis wt%

Na2O : 10.79, K2O : 4.93, SrO : 0.96, BaO : 0.58, Nb2O5 : 5.05, TiO2 : 46.68, SiO2 : 17.80, H2O : 11.70 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 92)

Strunz 9th edition incl. updates

9.AG.30

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
30:Sitinakit-Gruppe

Lapis Classification

VIII/B.16-030

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
16: Kationen mit Koordinationszahlen zwischen [8] und [12]

Classification by Hölzel

9.AG.410

9: SILICATES
A: Nesosilicates
G: Nesosilicates with Cation: O
4: C small + large; Titanite-Group

Dana 8th edition

52.04.11.01

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
04: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or > [6] coordination

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, hellbraun, rosa

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.208

Birefringence chart\! Sitinakite title=Birefringence chart Sitinakite

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

1.780

RI value γ / ε

1.988

Ri mean

1.849

2V angle

Uniaxial (+)

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

132

Space Group

P42/mcm

Cell parameters a (Å)

7.819

Cell parameters b (Å)

-

Cell parameters c (Å)

12.099

Cell parameters a/b or c/a

1.547

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

739.694

X-Ray Powder Diffraction

7.84(100),
6.02(100),
5.04(40),
3.36(50),
3.25(80),
2.805(50),
2.608(60),
2.003(70)

XRD chart Sitinakite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.75

VHN (Hardness Vickers)

356 (40g)

Density (g/cm³)

2.86

2.954 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {100} und teilbar {001}

Fracture

treppenartig

Tenacity

zerbrechlich

Instability

- verdünnte Säuren

Preface

Author (Name, Year)

Men'shikov & Sokolova & Egorov-Tismenko & Khomyakov & Polezhaeva, 1992

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 121 (1992) (1), 94

Other languages

German

Sitinakit

Spanish

Sitinakita

English

Sitinakite

French

Sitinakite

Russian

Ситинакит

CNMNC (IMA)-Number

IMA 1989-051

CNMNC symbol

Symbol

Sit

Locations with GPS information