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Widenmannite

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Widenmannit
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Widenmannit (SNr: 05.038)  E
Analysed with energy dispersive X-ray spectroscopy EDX
R
Analysed with RAMAN spectroscopy

Widenmannit (EDX und Raman) als gelbe, blättrige Kristalle auf Galenit von der Abrahamhalde, Lauta/Marienberg; in der Paragenese Devillin, Metazeunerit, Malachit; BB=1.1 mm.

Collection: Lynx
Copyright: Hannes Osterhammer
Contribution: Lynx 2016-03-16
Locality: Schacht 139 (Abrahamhalde) / Lauta / Marienberg / Marienberg, Revier / Erzgebirgskreis / Sachsen / Deutschland

Collectors Summary

Color hellgelb
Streak color weiß
Hardness (Mohs) 2
Solubility +++ verdünnte HNO3
Crystal System orthorhombisch, Pmmn

Chemism

Chem­ical formula

Pb2(OH)2[(UO2)(CO3)2]

Addi­tional chem. informa­tion

Blei Uranyl-Karbonat

Chem­ical com­po­si­tion

Blei, Kohlenstoff, Sauerstoff, Uran, Wasserstoff

Unit weight: 838.480667 u; Number of atoms in the formula: 17

Info

Empirical formula:

Pb2(OH)2[(UO2)(CO3)2]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.24

2

11.76

1.0079470

2.0158940

Carbon

C

2.86

2

11.76

12.0107800

24.0215600

Oxygen

O

19.08

10

58.82

15.9994300

159.9943000

Lead

Pb

49.43

2

11.76

207.2100000

414.4200000

Uranium

U

28.39

1

5.88

238.0289130

238.0289130

Anal­y­sis wt%

PbO : 48.30, UO3 : 34.20, CO2 : 16.50 (Ref: Schweizerische Mineralogische und Petrographische

Mitteilungen 76)

Strunz 9th edi­tion incl. updates

5.ED.40

5: Carbonate (Carbonate, Nitrate)
E: Uranylcarbonate
D: UO2:CO3 = 1:4
40:Widenmannit-Gruppe

Lapis Clas­sifica­tion

V/F.07-010

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

Clas­sifica­tion by Hölzel

5.EA.300

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

Dana 8th edi­tion

14.01.05.01

14: Anhydrous Carbonates
01: Anhydrous Carbonates with Simple Formula A+ CO3

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

hellgelb

Streak color

weiß

max. Birefrin­gence

0.142

Birefringence chart\! Widenmannite title=Birefringence chart Widenmannite

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

1.803

RI value β

1.905

RI value γ / ε

1.945

Ri mean

1.884

2V angle

Biaxial (-) 63°

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

59

Space Group

Pmmn

Cell param­e­ters a (Å)

4.9744(9)

Cell param­e­ters b (Å)

9.3816(16)

Cell param­e­ters c (Å)

8.9539(15)

Cell param­e­ters a/b or c/a

0.53

Cell param­e­ters c/b

0.954

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

417.859

X-Ray Pow­der Diffrac­tion

4.16(80),
4.05(10),
3.970(10),
3.235(30),
2.989(10),
2.564(10),
2.409(10),
2.345(100)

XRD chart Widenmannite

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)

2

VHN (Hard­ness Vick­ers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.89

6.664 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ verdünnte HNO3

Preface

Author (Name, Year)

Walenta & Wimmenauer, 1961

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

Schweizerische Mineralogische und Petrographische Mitteilungen 56 (1976), 167

American Mineralogist, 99 (2014), 276–282 [Neue Formel, Kristallstruktur]

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Widenmannite

Pb2(OH)2[(UO2)(CO3)2]

orthorhombisch : mmm : Pmmn

5.ED.40

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Widenmannite

Pb2(OH)2[(UO2)(CO3)2]

orthorhombisch : mmm : Pmmn

V/F.07-010

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Widenmannite

Pb2(OH)2[(UO2)(CO3)2]

orthorhombisch : mmm : Pmmn

5.EA.300

Čejkaite

Na4UO2(CO3)3

triklin : 1 : P1 ?

5.EA.320

Agricolaite

K4(UO2)(CO3)3

monoklin : 2/m : C2/c

5.EA.330

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Calcite

CaCO3

trigonal : 3m : R3c

14.01.01.01

Magnesite

MgCO3

trigonal : 3m : R3c

14.01.01.02

Siderite

Fe2+CO3

trigonal : 3m : R3c

14.01.01.03

Rhodochrosite

Mn(CO3)

trigonal : 3m : R3c

14.01.01.04

Smithsonite

ZnCO3

trigonal : 3m : R3c

14.01.01.06

Otavite

CdCO3

trigonal : 3m : R3c

14.01.01.07

Gaspéite

(Ni,Mg,Fe2+)CO3

trigonal : 3m : R3c

14.01.01.08

Vaterite

CaCO3

hexagonal : 6/mmm : P63/mmc

14.01.02.01

Gregoryite

(Na2,K2,Ca)CO3

hexagonal : 6mm : P63mc

14.01.02.02

Aragonite

CaCO3

orthorhombisch : mmm : Pmcn

14.01.03.01

Witherite

BaCO3

orthorhombisch : mmm : Pmcn

14.01.03.02

Strontianite

SrCO3

orthorhombisch : mmm : Pmcn

14.01.03.03

Cerussite

PbCO3

orthorhombisch : mmm : Pmcn

14.01.03.04

Rutherfordine

UO2(CO3)

orthorhombisch : mm2 : Imm2

14.01.04.01

Widenmannite

Pb2(OH)2[(UO2)(CO3)2]

orthorhombisch : mmm : Pmmn

14.01.05.01

Natrite

Na2CO3

monoklin : 2/m : C2/m

14.01.06.01

Zabuyelite

Li2CO3

monoklin : 2/m : C2/c

14.01.06.02

Čejkaite

Na4UO2(CO3)3

triklin : 1 : P1 ?

14.01.07.01

CNMNC (IMA)-Number

IMA 1974-008

CNMNC symbol

Symbol

Wdm

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

German pages

DeWikiPedia - search for: Widenmannit
Google-Bilder-Suche - search for: Widenmannit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Widenmannit

English pages

Mindat - search for: Widenmannite
Webmineral - search for:Widenmannite
Handbook-of-Mineralogy - search for: Widenmannite
RRUFF - Raman, XRD and other mineral data - search for: Widenmannite
RRUFF - References and PDF downloads - search for: Widenmannite
American-Mineralogist-Crystal-Structure-Database - search for: Widenmannite
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Mineral Dealer

German pages

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Locations with GPS information