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Stichtite (Stichtit)

Pictures (10 Images total)

Stichtit psm. nach Magnesiochromit in Serpentin
Views (File:
1276542858
): 27835
Stichtit psm. nach Magnesiochromit in Serpentin
Größe: 62x37 mm; Fundort: Stichtite Hill, Dundas, Zeehan District, Tasmanien, Australien
Copyright: John Sobolewski; Contribution: slugslayer
Location: Australien/Tasmanien/West Coast Municipality/Zeehan District/Dundas/Stichtite Hill
Mineral: Serpentine subgroup, Stichtite
Image: 1276542858
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
Stichtit psm. nach Magnesiochromit in Serpentin

Größe: 62x37 mm; Fundort: Stichtite Hill, Dundas, Zeehan District, Tasmanien, Australien
Copyright: John Sobolewski
Contribution: slugslayer 2010-06-14
Locality: Stichtite Hill / Dundas / Zeehan District / West Coast Municipality / Tasmanien / Australien
Stichtit
Views (File:
1281990277
): 4415
Stichtit
Größe: 27,5 cm; Fundort: Stichtite Hill, Dundas, Zeehan District, Tasmanien, Australien
Copyright: Andrew Tuma; Contribution: slugslayer
Location: Australien/Tasmanien/West Coast Municipality/Zeehan District/Dundas/Stichtite Hill
Mineral: Stichtite
Image: 1281990277
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Stichtit

Größe: 27,5 cm; Fundort: Stichtite Hill, Dundas, Zeehan District, Tasmanien, Australien
Copyright: Andrew Tuma
Contribution: slugslayer 2010-08-16
Locality: Stichtite Hill / Dundas / Zeehan District / West Coast Municipality / Tasmanien / Australien
lila derber Stichtit
Views (File:
1159215733
): 5839
lila derber Stichtit
Größe: 46x30mm; Fundort: Stichtite Hill, Dundas, Zeehan District, Tasmanien, Australien
Copyright: John Sobolewski; Contribution: slugslayer
Location: Australien/Tasmanien/West Coast Municipality/Zeehan District/Dundas/Stichtite Hill
Mineral: Stichtite
Image: 1159215733
Rating: 6.33 (votes: 3)
License: Usage for Mineralienatlas project only
lila derber Stichtit

Größe: 46x30mm; Fundort: Stichtite Hill, Dundas, Zeehan District, Tasmanien, Australien

Copyright: John Sobolewski
Contribution: slugslayer 2006-09-25
Locality: Stichtite Hill / Dundas / Zeehan District / West Coast Municipality / Tasmanien / Australien
Stichtit in Calcit
Views (File:
1245602613
): 3423
Stichtit in Calcit
Größe: 80x45x40 mm; Fundort: Saranovskii Mine (Bergwerk Sarany), Permskaya Oblast', Ural, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Wolga, Föderationskreis/Perm, Region (Пе́рмский край)/Gornozavodskiy-Gebiet (Горнозаво́дский райо́н)/Saranovskii Mine (Rudnaya, Sarany; Saranovskoe)
Mineral: Stichtite
Image: 1245602613
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
Stichtit in Calcit

Größe: 80x45x40 mm; Fundort: Saranovskii Mine (Bergwerk Sarany), Permskaya Oblast', Ural, Russland
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-21
Locality: Saranovskii Mine (Rudnaya, Sarany; Saranovskoe) / Gornozavodskiy-Gebiet (Горнозаво́дский райо́н) / Perm, Region (Пе́рмский край) / Wolga, Föderationskreis / Russland
Stichtit auf Calcit
Views (File:
1245602579
): 4734
Stichtit auf Calcit
Größe: 80x45 mm; Fundort: Saranovskii Mine (Bergwerk Sarany), Permskaya Oblast', Ural, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Wolga, Föderationskreis/Perm, Region (Пе́рмский край)/Gornozavodskiy-Gebiet (Горнозаво́дский райо́н)/Saranovskii Mine (Rudnaya, Sarany; Saranovskoe)
Mineral: Stichtite
Image: 1245602579
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Stichtit auf Calcit

Größe: 80x45 mm; Fundort: Saranovskii Mine (Bergwerk Sarany), Permskaya Oblast', Ural, Russland
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-21
Locality: Saranovskii Mine (Rudnaya, Sarany; Saranovskoe) / Gornozavodskiy-Gebiet (Горнозаво́дский райо́н) / Perm, Region (Пе́рмский край) / Wolga, Föderationskreis / Russland
Stichtit
Views (File:
1245603650
): 1353
Stichtit
Größe: 11 x 7 x 1,8 cm; Fundort: Kaznakhtinskii-Massiv, Altai-Republik, Sibirien, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Sibirien, Föderationskreis/Altai-Republik/Ust-Koksa/Kaznakhtinskii-Massiv
Mineral: Stichtite
Image: 1245603650
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Stichtit

Größe: 11 x 7 x 1,8 cm; Fundort: Kaznakhtinskii-Massiv, Altai-Republik, Sibirien, Russland
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-21
Locality: Kaznakhtinskii-Massiv / Ust-Koksa / Altai-Republik / Sibirien, Föderationskreis / Russland

You find additional Stichtit specimen at the Geolitho Museum

Collectors Summary

Color fliederfarben, hellviolett, rosa
Streak color blass violett blau
Hardness (Mohs) 1.75
Cleavages {0001} vollkommen
Solubility +++ Säuren
Crystal System trigonal, R3m

Chemism

Chemical formula

Mg6Cr2(CO3)(OH)16·4H2O

Chemical composition

Chrom, Magnesium, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 654.011078 u; Number of atoms in the formula: 56

Info

Empirical formula:

Mg6Cr2(CO3)(OH)16·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

3.70

24

42.86

1.0079470

24.1907280
Carbon

C

1.84

1

1.79

12.0107800

12.0107800
Oxygen

O

56.27

23

41.07

15.9994300

367.9868900
Magnesium

Mg

22.30

6

10.71

24.3050600

145.8303600
Chromium

Cr

15.90

2

3.57

51.9961600

103.9923200

Analysis wt%

MgO : 36.59, Fe2O3 : 4.04, Al2O3 : 2.24, Cr2O3 : 14.08, CO2 : 6.94, H2O : 33.01, SiO2 : 2.09 (Ref: Dana, 7th ed. 1)

Strunz 9th edition incl. updates

5.DA.50

5: Carbonate (Carbonate, Nitrate)
D: Carbonate mit weitere Anionen, mit H2O
A: Mit mittelgroßen [Kationen]
50:Hydrotalkit-Gruppe

Lapis Classification

V/E.03-020

V: NITRATE, CARBONATE UND BORATE
E: Wasserhaltige Carbonate, mit fremden Anionen
3: Hydrotalkit-Gruppe

Classification by Hölzel

5.DD.540

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
D: Carbonates (+Anions +Water)
D: Hydrotalcite Series
5: Pyroaurite-Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Hydrotalcite Supergroup  ⇒ Hydrotalcite Group

Optical Properties

Color

fliederfarben, hellviolett, rosa

Streak color

blass violett blau

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.027
Birefringence chart\! Stichtite title=Birefringence chart Stichtite

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

1.545

RI value γ / ε

1.518

Ri mean

1.536

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

3.096

Cell parameters b (Å)

-

Cell parameters c (Å)

23.507

Cell parameters a/b or c/a

7.593

Cell parameters c/b

-

Z

0.375

Volumne (ų)

195.133

X-Ray Powder Diffraction

7.76(100),
3.90(30),
2.607(10),
2.323(10),
1.976(10),
1.764(10),
1.545(10),
1.516(10)
XRD chart Stichtite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

1.75

Density (g/cm³)

2.2

2.087 ( ρ calc. Mineralienatlas )

Cleavages

{0001} vollkommen

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Australien/Tasmanien/West Coast Municipality/Zeehan District/Dundas/Stichtite Hill

Preface

Occurrences

Verwitterungsprodukt von Chromit in Serpentinit-Vorkommen

Name from

nach Sticht, Robert Carl (1856 - 1922), einem der führenden Fachleute für Metallurgie seiner Zeit, Chefmanager der Mt. Lyell Company, Queenstown, Tasmanien.

Author (Name, Year)

Petterd, 1910

References

Petterd, W.F. (1910): Catalogue of the minerals of Tasmania. Department of Mines, Tasmania. (nennt Stichtit als Mineral, die erste Veröffentlichung der Untersuchungsergebnisse kann Petterd (1849-1910) vor seinem Ableben nicht mehr zusammenstellen)

Twelvetrees, W.H. (Ed.) (1914): Stichtite, a new Tasmanian mineral. Record Geological Survey Tasmania 2.

Handbook of Mineralogy (Anthony et al.), 3 (1997), 534

Stuart J. Mills, Pamela S. Whitfield, Siobhan A. Wilson, Joanne N. Woodhouse, Gregory M. Dipple, Mati Raudsepp, Carl A. Francis: The crystal structure of stichtite, re-examination of barbertonite, and the nature of polytypism in MgCr hydrotalcites. American Mineralogist 96 (2011) S.179-187.

IMA group assignments

 
Hydrotalcite Supergroup
 
 
 

 
 
Hydrotalcite Group
 
 
 

 
 
 
Desautelsite
Mg6Mn3+2(CO3)(OH)16·4H2O
trigonal
R3m, R3m

 
 
 
Droninoite
Ni6Fe3+2Cl2(OH)16·4H2O
trigonal
R3m

 
 
 
Hydrotalcite
Mg6Al2(CO3)(OH)16·4H2O
trigonal
R3m

 
 
 
Iowaite
Mg6Fe3+2(OH)16Cl2·4H2O
trigonal
R3m

 
 
 
Kaznakhtite
Ni6Co3+2(CO3)(OH)16⋅4H2O
trigonal
R3

 
 
 
Meixnerite
Mg6Al2(OH)18·4H2O
trigonal
R3m

 
 
 
Pyroaurite-2H
Mg6Fe23+[(OH)16|CO3]·4H2O
hexagonal
P63/mmc

 
 
 
Pyroaurite-3R
Mg6Fe23+(CO3)(OH)16·4H2O
trigonal
R3m

 
 
 
Reevesite
Ni6Fe23+(CO3)(OH)16·4H2O
trigonal
R3m

 
 
 
Stichtite
Mg6Cr2(CO3)(OH)16·4H2O
trigonal
R3m

 
 
 
Takovite
Ni6Al2(CO3)(OH)16·4H2O
trigonal
R3m

 
 
 
Woodallite
Mg6(Cr,Fe3+)2(OH)16Cl2·4H2O
trigonal
R3m

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Actuality: 23. Mar 2023 - 06:30:52

Other languages

German

Stichtit

Spanish

Stichtita

English

Stichtite

French

Stichtite

Russian

Стихтит

Alternative Name

Chrom-Brugnatellite

CNMNC symbol

Symbol

Stt

Locations with GPS information