Whewellite Mineral Data

Whewellite Mineral Data
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General Whewellite Information

Help on Chemical Formula: Chemical Formula: Ca(C2O4)•(H2O)
Help on Composition: Composition: Molecular Weight = 146.11 gm
   Calcium   27.43 %  Ca   38.38 % CaO
   Hydrogen   1.38 %  H    12.33 % H2O
   Carbon    16.44 %  C    49.29 % C2O3
   Oxygen    54.75 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaC2O4•(H2O)
Help on Environment: Environment: The mineral is deposited from low temperature hydrothermal solutions which have come into contact with carboniferous lithologies, releasing methane, such as in graphitic schists or, primarily, from areas surrounding coa
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1852
Help on Locality: Locality: The classic locality occurs in the anthracite deposits of the Doehlener Basin of Freital and Burgk, where clear crystals of up to 2 cm, mostly twinned, are found in association with ca Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the British mineralogist, crystallographer and natural philosopher William Whewell (1794-1866), professor of mineralogy at Cambridge.
Help on Name Pronunciation: Name Pronunciation: Whewellite + Pronunciation Say WHEWELLITE
Help on Synonym: Synonym: Calcium Oxalate
  ICSD 30782
  PDF 20-231
 

Whewellite Image

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Whewellite

Comments: Colorless, twinned crystal of Whewellite.
Location: Burgk, near Dresden, Saxony, Germany. Scale: Crystal size 7 mm.
© Thomas Witzke / Abraxas-Verlag
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Whewellite

Comments: White crystal of whewellite, perched on a spray of brown calcite crystals.
Location: Shaft 21, Schlema, Hartenstein, Germany. Scale: 7 x 6 x 4 cm.
© Rob Lavinsky

Whewellite Crystallography
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.65(1), 5.93(1), 2.968(0.8),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 0 1 4) ( 0 1 0) ( 1 2 0) ( 1 1 0) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Whewellite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
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A - Atoms On/Off
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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 Whewellite

Help on Color: Color: Brownish, Colorless, Gray, Yellow, Yellow brown.
 

Optical Properties of Whewellite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -1.077 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -1.041 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.25,KPDmeas= 0.2545,KC= 0.1225
Ncalc = 1.27 - 1.28
 

Calculated Properties of Whewellite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Whewellite =2.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024436466
Boson Index = 0.9975563534
Help on Photoelectric: Photoelectric: PEWhewellite = 3.53 barns/electron
U=PEWhewellite x rElectron Density= 8.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Whewellite is Not Radioactive
 

Whewellite Classification
Help on Dana Class: Dana Class: 50.01.01.01 (50)Salts of Organic Acids
  (50.01)(Oxalates)
  (50.01.01)Dana Group
 
50.01.01.01 Whewellite Ca(C2O4)•(H2O) P 21/c 2/m
Help on Strunz Class: Strunz Class: 10.AB.45 10 - ORGANIC COMPOUNDS
  10.A - Salts of Organic Acids
  10.AB -Oxalates
 
10.AB.45 Whewellite Ca(C2O4)•(H2O) P 21/c 2/m
 

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

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Ask about Whewellite 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 Espaņol

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

Whewellite

Ca(C2O4)•(H2O)
Dana No: 50.01.01.01 Strunz No: 10.AB.45
Locality:

 

Notes: