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Weddellite

Pictures (3 Images total)

Weddellit
Views (File:
1319115148
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Weddellit
Bildbreite: 8,5 mm; Fundort: Grube Cerchiara, Vara-Tal, Ligurien, Italien
Copyright: Enrico Bonacina; Contribution: Hg
Location: Italien/Ligurien (Liguria), Region/La Spezia, Provinz/Vara-Tal/Cerchiara Mine
Mineral: Weddellite
Image: 1319115148
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Weddellit

Bildbreite: 8,5 mm; Fundort: Grube Cerchiara, Vara-Tal, Ligurien, Italien

Copyright: Enrico Bonacina
Contribution: Hg 2011-10-20
Locality: Cerchiara Mine / Vara-Tal / La Spezia, Provinz / Ligurien (Liguria), Region / Italien
Weddelit xx
Views (File:
1144493381
): 2841
Weddelit xx
Fundort: Buca della Vena Mine, Apuanische Alpen, Toskana, Italien; Bildbreite: 8 mm
Copyright: loismin; Contribution: loismin
Location: Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Stazzema/Buca della Vena
Mineral: Weddellite
Image: 1144493381
Rating: 4.67 (votes: 3)
License: Usage for Mineralienatlas project only
Weddelit xx

Fundort: Buca della Vena Mine, Apuanische Alpen, Toskana, Italien; Bildbreite: 8 mm

Copyright: loismin
Contribution: loismin 2006-04-08
Locality: Buca della Vena / Stazzema / Massa-Carrara, Provinz / Toskana (Toscana) / Italien
blockiger gelber Weddellit
Views (File:
1492935414
): 1031
blockiger gelber Weddellit
von Biggs, Sherman Co., Oregon, USA; BB = 4,5 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A038501, Donator: anatase2
Location: USA/Oregon/Sherman Co./Biggs Junction/Biggs Jasper Lagerstätte
Mineral: Weddellite
Image: 1492935414
License: Usage for Mineralienatlas project only
blockiger gelber Weddellit (SNr: A038501)

von Biggs, Sherman Co., Oregon, USA; BB = 4,5 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2017-04-23
Locality: Biggs Jasper Lagerstätte / Biggs Junction / Sherman Co. / Oregon / USA

You find additional specimen at the Geolitho Museum

Collectors Summary

Color farblos, bräunlich, weiß, gelblichbraun, braun
Streak color weiß
Hardness (Mohs) 4
Solubility +++ Säuren, - H2O
Crystal System tetragonal, I4/m

Chemism

Chemical formula

Ca(C2O4)·2H2O

Chemical composition

Calcium, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 164.128328 u; Number of atoms in the formula: 13

Info

Empirical formula:

Ca(C2O4)·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.46

4

30.77

1.0079470

4.0317880

Carbon

C

14.64

2

15.38

12.0107800

24.0215600

Oxygen

O

58.49

6

46.15

15.9994300

95.9965800

Calcium

Ca

24.42

1

7.69

40.0784000

40.0784000

Analysis wt%

CaO : 34.17, C2O3 : 43.87, H2O : 21.96

Strunz 9th edition incl. updates

10.AB.40

10: Organische Verbindungen
A: Salze organischer Säuren
B: Oxalate
40:

Lapis Classification

IX/A.01-020

IX: ORGANISCHE VERBINDUNGEN
A: Salze organischer Säuren
1: Oxalate [C2O4] 2-

Classification by Hölzel

A.AA.210

A: ORGANIC COMPLEXES
A: Carbonacids and their Salts
A: Oxalates

Dana 8th edition

50.01.02.01

50: Organic Minerals
01: Salts of Organic Acids (Oxalates)
02: Weddellite Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959)

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, bräunlich, weiß, gelblichbraun, braun

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.021

Birefringence chart\! Weddellite title=Birefringence chart Weddellite

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

1.523

RI value γ / ε

1.544

Ri mean

1.530

2V angle

Uniaxial (+)

Crystallography

Crystal System

tetragonal

Class (H-M)

4/m

Space Group number

87

Space Group

I4/m

Cell parameters a (Å)

12.35

Cell parameters b (Å)

-

Cell parameters c (Å)

7.363

Cell parameters a/b or c/a

0.596

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

1123.023

X-Ray Powder Diffraction

6.17(90),
4.40(60),
2.773(100),
2.235(70),
2.118(50),
1.956(60),
1.895(70),
1.835(60)

XRD chart Weddellite

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

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.02

1.941 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren, - H2O

(Co-)Type locality

(Co-)Type locality

Antarktika/Westantarktis/Weddell-See

Preface

Author (Name, Year)

Frondel & Prien, 1942

References

Acta Crystallographica 18 (1965), 917.

Mineralogical Magazine 34 (1965), 256.

American Mineralogist 65 (1980), 327.

Handbook of Mineralogy (Anthony u.w.), 5 (2003), 750.

American Mineralogist 89 (2004), 245.

Mills, S.J.; Christy, Andrew G. - The Great Barrier Reef Expedition 1928–29: The crystal structure and occurrence of weddellite, ideally CaC2O4·2.5H2O, from the Low Isles, Queensland - Mineralogical Magazine [online: 17. Dezember 2015]

Other languages

German

Weddellit

Spanish

Weddellita

French

Weddellite

English

Weddellite

Russian

Уэдделит

Russian

Уэдделлит

Alternative Name

Hydrated Calcium Oxalate

CNMNC symbol

Symbol

Wed

Locations with GPS information

IDs

GUSID (Global unique identifier short form) j5Vxkmn5f0W3FgTNzWNTxw
GUID (Global unique identifier) 9271958F-F969-457F-B716-04CDCD6353C7
Database ID 4135