Weddellite Mineral Data (original) (raw)

General Weddellite Information

Help on Chemical Formula: Chemical Formula:

Ca(C2O4)•2(H2O)

Help on Composition: Composition:

Molecular Weight = 164.13 gm

Calcium 24.42 % Ca 34.17 % CaO

Hydrogen 2.46 % H 21.95 % H2O

Carbon 14.64 % C 43.88 % C2O3

Oxygen 58.49 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ca(C2O4)•2(H2O)

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1942

Help on Locality: Locality:

Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for the Weddel sea, Antactica.

Help on Name Pronunciation: Name Pronunciation:

Weddellite + Pronunciation Say WEDDELLITE

Help on Synonym: Synonym:

Calcium Oxalate

ICSD 30783

PDF 17-541

Weddellite Image

Click Here for Larger Weddellite Image in a New Browser Window Images:

Weddellite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:0.59635

Help on Cell Dimensions: Cell Dimensions:

a = 12.33, c = 7.353, Z = 8; V = 1,117.87 Den(Calc)= 1.95

Help on Crystal System: Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 6.18(1), 2.775(0.65), 4.42(0.3),

Click Here for Large Weddellite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | Tazzoli V , Domeneghetti M C , American Mineralogist , 65 (1980) p.327-334, The crystal structures of whewellite and weddellite: re-examination and, comparison | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Weddellite

Help on Cleavage: Cleavage:

{010} Good

Help on Color: Color:

Colorless, Tan, White, Yellowish brown, Brown.

Help on Density: Density:

2.02

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Hardness: Hardness:

4 - Fluorite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Weddellite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.804 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.869 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2736,KPDmeas= 0.2641,KC= 0.1464
Ncalc = 1.29 - 1.3

Help on Optical Data: Optical Data:

Uniaxial (+), w=1.523, e=1.544, bire=0.0210.

Calculated Properties of Weddellite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.07 gm/cc
note: Specific Gravity of Weddellite =2.02 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0022240567
Boson Index = 0.9977759433

Help on Photoelectric: Photoelectric:

PEWeddellite = 3.15 barns/electron
U=PEWeddellite x rElectron Density= 6.51 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Weddellite is Not Radioactive

Weddellite Classification

Help on Dana Class: Dana Class:

50.01.02.01 (50)Salts of Organic Acids

(50.01)(Oxalates)

(50.01.02)Weddellite Group

50.01.02.01 Weddellite Ca(C2O4)•2(H2O) I 4/m 4/m

50.01.02.02 Caoxite! Ca(C2O4)•3(H2O) P1 1

Help on Strunz Class: Strunz Class:

10.AB.40 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AB -Oxalates

10.AB.40 Weddellite Ca(C2O4)•2(H2O) I 4/m 4/m

Other Weddellite Information

Help on References: References:

NAME( Athena) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Weddellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Weddellite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Weddellite :

A Bijoux Google Search for Weddellite
Adam's Minerals Google Search for Weddellite
Cape Minerals Google Search for Weddellite
Dakota Matrix Minerals Google Search for Weddellite
Excalibur Mineral Corp. Google Search for Weddellite
Exceptional Minerals Google Search for Weddellite
John Betts Fine Minerals Search for Weddellite
McDougall Minerals Google Search for Weddellite
Mineral News Website Link
Rock and Mineral Shows Google Search for Weddellite
Weinrich Minerals, Inc. Google Search for Weddellite

Ask about Weddellite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Weddellite Specimen Label here :

Weddellite

Ca(C2O4)•2(H2O)
Dana No: 50.01.02.01 Strunz No: 10.AB.40
Locality:

Notes: