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Wyartite (Wyartit)

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Wyartit
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Wyartit
Gelbbrauner Wyartit mit grünem Zeunerit von der Grube Georg Wagsfort, Johanngeorgenstadt, Erzgebirge, Sachsen, Deutschland. Breite der Probe ca. 3 cm. Historisches Material um 1910, wahrscheinlich vom Wagsfort Spat.
Copyright: raritätenjäger; Contribution: raritätenjäger
Collection: raritätenjäger
Location: Deutschland/Sachsen/Erzgebirgskreis/Johanngeorgenstadt/Grube Georg Wagsfort
Mineral: Wyartite
Image: 1485274431
License: Usage for Mineralienatlas project only
Wyartit

Gelbbrauner Wyartit mit grünem Zeunerit von der Grube Georg Wagsfort, Johanngeorgenstadt, Erzgebirge, Sachsen, Deutschland. Breite der Probe ca. 3 cm. Historisches Material um 1910, wahrscheinlich ...
Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2017-01-24
Locality: Grube Georg Wagsfort / Johanngeorgenstadt / Erzgebirgskreis / Sachsen / Deutschland

Collectors Summary

Color grünlich schwarz, schwarz, schwarz violet
Streak color bräunlich violet
Lustre Matt, Glasglanz
Hardness (Mohs) 3 - 4
Cleavages {001} vollkommen, {010} vollkommen
Solubility +++ Säuren
Crystal System orthorhombisch, P212121

Chemism

Chemical formula

CaU5+(UO2)2(CO3)O4(OH)·7H2O

Chemical composition

Calcium, Kohlenstoff, Sauerstoff, Uran, Wasserstoff

Unit weight: 1085.284294 u; Number of atoms in the formula: 39

Info

Empirical formula:

CaU(UO2)2(CO3)O4(OH)·7H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.39

15

38.46

1.0079470

15.1192050
Carbon

C

1.11

1

2.56

12.0107800

12.0107800
Oxygen

O

28.01

19

48.72

15.9994300

303.9891700
Calcium

Ca

3.69

1

2.56

40.0784000

40.0784000
Uranium

U

65.80

3

7.69

238.0289130

714.0867390

Analysis wt%

UO3 : 70.60, UO2 : 10.70, CaO : 6.70, CO2 : 3.60, H2O : 8.40 (Ref: Bulletin de Mineralogie 59)

Strunz 9th edition incl. updates

5.EA.15

5: Carbonate (Carbonate, Nitrate)
E: Uranylcarbonate
A: UO2:CO3 = 1:1
15:Wyartit-Gruppe

Lapis Classification

V/F.05-010

V: NITRATE, CARBONATE UND BORATE
F: Uranylcarbonate [UO2] 2+ – [CO3] 2-

Classification by Hölzel

5.ED.360

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
E: Uranyl-Carbonates
D: Uranyl-Carbonates (+Anions +Water)

Dana 8th edition

16b.07.04.01

16b: Carbonates - Hydroxyl or Halogen
07: Carbonates - Hydroxyl or Halogen

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grünlich schwarz, schwarz, schwarz violet

Streak color

bräunlich violet

Change in color

gealtert: grünlich

Diaphaneity (Transparency)

durchscheinend bis opak

Lustre

Matt, Glasglanz

max. Birefringence

0.11
Birefringence chart\! Wyartite title=Birefringence chart Wyartite

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

1.89

RI value β

1.8

RI value γ / ε

1.89

Ri mean

1.91

2V angle

Biaxial (-) 48° (gemessen)

Orientation

X = c, Y = b, Z = a

Pleochroism

grau, violett, levendelblau

Crystallography

Crystal System

orthorhombisch

Class (H-M)

222

Space Group number

19

Space Group

P212121

Cell parameters a (Å)

11.271

Cell parameters b (Å)

7.106

Cell parameters c (Å)

20.807

Cell parameters a/b or c/a

1.586

Cell parameters c/b

2.928

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1666.469

X-Ray Powder Diffraction

10.375(100),
5.205(80),
3.55(70),
3.47(70),
3.35(70),
3.27(90),
2.99(70),
2.60(50)
XRD chart Wyartite

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 - 4

Density (g/cm³)

4.69 (gemessen) 4.65 (berechnet)

4.325 ( ρ calc. Mineralienatlas )

Cleavages

{001} vollkommen, {010} vollkommen

Instability

+++ Säuren

Chemical Properties and Tests

Wandelt sich an der Luft in Wyartit-II um

(Co-)Type locality

(Co-)Type locality

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

Preface

Name from

Jean Wyart (1902-1992), Professor der Mineralogie, Sorbonne, Paris, Frankreich

Author (Name, Year)

Guillemin & Protas, 1959

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

Bulletin de la Société Française Minéralogie et de Cristallographie 82 (1959), 80

American Mineralogist (1959) 44, 908

Burns, P.C. and Finch, R.J. (1999) Wyartite: crystallographic evidence for the first pentavalent-uranium mineral. American Mineralogist 84 (1999), 1456-1460

Burns, P.C. - U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist (2005) 43, 1839-1894

Names

12-0635

ICCD#

12-0636

ICCD#

Other languages

German

Wyartit

Spanish

Wyartita

English

Wyartite

French

Wyartite

Russian

Виартит

Japanese

ｳｨｱﾙﾀｲﾄ

Alternative Name

Ianthinite (of Bignand)

German

Wyartit-I

English

Wyartite-I

CNMNC symbol

Symbol

Wya

Locations with GPS information