Mineralogy Database

Caoxite Mineral Data

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General Caoxite Information

Help on Chemical  Formula: Chemical Formula: Ca(C2O4)•3(H2O)
Help on Composition: Composition: Molecular Weight = 182.14 gm
   Calcium   22.00 %  Ca   30.79 % CaO
   Hydrogen   3.32 %  H    29.67 % H2O
   Carbon    13.19 %  C    39.54 % C2O3
   Oxygen    61.49 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaC2O4•3(H2O)
Help on Environment: Environment: In open fractures (up to 0.5 mm wide) cutting manganese and barium rich mineralized metacherts.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: The Cerchiara mine, near Faggiona, Val di Vara, La Spezia, eastern Liguria, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the acronym of "Centennial Anniversary Of X-rays" and also for Calcium Oxalate.
Help on Synonym: Synonym: ICSD 77096
  PDF 20-232

Caoxite Image

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Comments: Colorless to white crystals of caoxite on matrix.
Location: Cerchiara Mine, Faggiona, Vara valley, La Spezia province, Liguria, Italy. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Caoxite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8469:1:1.1802
Help on Cell Dimensions: Cell Dimensions: a = 6.076, b = 7.174, c = 8.467, Z = 2; alpha = 76.65°, beta = 70.85°, gamma = 70.917° V = 320.58 Den(Calc)= 1.89
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.52(1),

Physical Properties of Caoxite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless.
Help on Density: Density: 1.85
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Caoxite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.667 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.667 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.276,KPDmeas= 0.276,KC= 0.1655
Ncalc = 1.31
Help on Optical Data: Optical Data: Biaxial (-), a=1.483, b=1.516, g=1.533, bire=0.0500

Calculated Properties of Caoxite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.91 gm/cc
note: Specific Gravity of Caoxite =1.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0020479048
Boson Index = 0.9979520952
Help on Photoelectric: Photoelectric: PECaoxite = 2.85 barns/electron
U=PECaoxite x rElectron Density= 5.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Caoxite is Not Radioactive

Caoxite Classification

Help on  Dana Class: Dana Class: (50)Salts of Organic Acids
  (50.01.02)Weddellite Group Weddellite Ca(C2O4)•2(H2O) I 4/m 4/m Caoxite! Ca(C2O4)•3(H2O) P1 1
Help on  Strunz Class: Strunz Class: 10.AB.50 10 - ORGANIC COMPOUNDS
  10.A - Salts of Organic Acids
  10.AB -Oxalates
10.AB.50 Caoxite! Ca(C2O4)•3(H2O) P1 1

Other Caoxite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p185,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Caoxite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 10.AB.50





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