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Oursinite (Oursinit)

Pictures (1 Images total)

Oursinit xx
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Oursinit xx
auf Cobalthaltigem Sklodowskit (olivgrünlich-gelb); Shinkolobwe/Kongo; analysierte Probe von Dr.Th.Witzke; Bildbreite ca.2,5 mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Demokratische Republik Kongo/Katanga (Shaba), Provinz/Ober-Katanga (Haut-Katanga), Distrikt/Shinkolobwe (Kasolo)
Mineral: Oursinite
Image: 1514389852
License: Usage for Mineralienatlas project only
Oursinit xx

auf Cobalthaltigem Sklodowskit (olivgrünlich-gelb); Shinkolobwe/Kongo; analysierte Probe von Dr.Th.Witzke; Bildbreite ca.2,5 mm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2017-12-27
Locality: Shinkolobwe (Kasolo) / Ober-Katanga (Haut-Katanga), Distrikt / Katanga (Shaba), Provinz / Demokratische Republik Kongo

Collectors Summary

Color blass gelb
Hardness (Mohs) 3.25
Solubility +++ Säuren
Crystal System orthorhombisch, Cmca

Chemism

Chemical formula

(Co,Mg)(UO2)2Si2O7·6H2O

Chemical composition

Kobalt, Magnesium, Silicium, Sauerstoff, Uran, Wasserstoff

Unit weight: 866.590725675 u; Number of atoms in the formula: 34

Info

Empirical formula:

(Co0.75Mg0.25)(UO2)2Si2O7·6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.40

12

35.29

1.0079470

12.0953640
Oxygen

O

31.39

17

50.00

15.9994300

271.9903100
Magnesium

Mg

0.70

0.25

0.74

24.3050600

6.0762650
Silicon

Si

6.48

2

5.88

28.0855300

56.1710600
Cobalt

Co

5.10

0.75

2.21

58.9332009

44.1999007
Uranium

U

54.93

2

5.88

238.0289130

476.0578260

Strunz 9th edition incl. updates

9.AK.10

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
K: Uranyl Insel(Neso)- und Schicht(Poly)-Silikate
10:Sklodowskit-Cuprosklodowskit-Gruppe mit U:Si = 1:1

Lapis Classification

VIII/B.34-030

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
34: Kationen mit Koordinationszahlen zwischen [8] und [12]; Uranyl-Inselsilikate mit [UO2] 2+-[SiO4] 4- und Verwandte

Classification by Hölzel

9.AN.160

9: SILICATES
A: Nesosilicates
N: Uranophane-Group

Dana 8th edition

53.03.01.07

53: Nesosilicates Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
03: Nesosilicates Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
01: Uranophane group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

blass gelb

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.026
Birefringence chart\! Oursinite title=Birefringence chart Oursinite

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

1.624

RI value β

1.640

RI value γ / ε

1.650

Ri mean

1.638

2V angle

Biaxial (-) 76°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

64

Space Group

Cmca

Cell parameters a (Å)

7.049

Cell parameters b (Å)

17.550

Cell parameters c (Å)

12.734

Cell parameters a/b or c/a

0.402

Cell parameters c/b

0.726

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1575.323

X-Ray Powder Diffraction

8.73(100),
7.20(70),
5.16(50),
4.55(30),
4.141(70),
3.528(40),
3.267(30),
2.853(90)
XRD chart Oursinite

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)

3.25

VHN (Hardness Vickers)

108 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.674

3.654 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Demokratische Republik Kongo/Katanga (Shaba), Provinz/Ober-Katanga (Haut-Katanga), Distrikt/Shinkolobwe (Kasolo)/Shinkolobwe Mine (Kasolo Mine)

Preface

Author (Name, Year)

Deliens & Piret, 1983

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

American Mineralogist 91 (2006), 333

Deliens M, Piret P (1983) L'oursinite (Co0,86Mg0,10Ni0,04)O·2UO3·2SiO2·6H2O, nouveau minéral de Shinkolobwe, Shaba, Zaïre, Bulletin de Minéralogie 106, 305-308

Other languages

German

Oursinit

Spanish

Oursinita

English

Oursinite

French

Oursinite

CNMNC (IMA)-Number

IMA 1982-051

CNMNC symbol

Symbol

Osn

Locations with GPS information