Mineralogy Database

Wooldridgeite Mineral Data

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General Wooldridgeite Information

Help on Chemical  Formula: Chemical Formula: Na2CaCu++2(P2O7)2•10(H2O)
Help on Composition: Composition: Molecular Weight = 741.19 gm
   Sodium       6.20 %  Na    8.36 % Na2O
   Calcium      5.41 %  Ca    7.57 % CaO
   Copper      17.15 %  Cu   21.46 % CuO
   Phosphorus  16.72 %  P    38.30 % P2O5
   Hydrogen     2.72 %  H    24.31 % H2O
   Oxygen      51.81 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2CaCu2(P2O7)2•10(H2O)
Help on Environment: Environment: Along fractures in Cambrian sedimentary rocks above an unconformity.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Found in the Judkins quarry, Nuneaton, Warwickshire, U.K. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after James Wooldridge (1923-1995), keen amateur mineralogist, micromounter and gemologist from Fernhill Heath, Worcestershire, U.K., who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Wooldridgeite + Pronunciation Say WOOLDRIDGEITE
Help on Synonym: Synonym: IMA1997-037
  Woolridgeite - Mineral name error corrected to wooldridgeite

Wooldridgeite Image

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Comments: SEM image of crystalline aggregates of wooldridgeite showing rhombic dipyramidal forms, (MinMag, v63:13).
Location: Judkins Quarry, Nuneaton, Warwickshire, England. Scale: Scale Bar 100 µm.
© Mineralogical Magazine

Wooldridgeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3633:1:0.3353
Help on Cell Dimensions: Cell Dimensions: a = 11.938, b = 32.854, c = 11.017, Z = 8; V = 4,320.99 Den(Calc)= 2.28
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F dd2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.52(1), 3.255(0.4), 4.05(0.4),

Physical Properties of Wooldridgeite

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish blue.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: very pale blue

Optical Properties of Wooldridgeite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2246,KC= 0.221
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (+), a=1.508, b=1.511, g=1.517, bire=0.0090, 2V(Calc)=72, 2V(Meas)=76.2. Dispersion none.

Calculated Properties of Wooldridgeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Wooldridgeite =2.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003257499
Boson Index = 0.9996742501
Help on Photoelectric: Photoelectric: PEWooldridgeite = 8.82 barns/electron
U=PEWooldridgeite x rElectron Density= 20.19 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wooldridgeite is Not Radioactive

Wooldridgeite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.14)Dana Group Wooldridgeite! Na2CaCu2(P2O7)2•10(H2O) F dd2 mm2
Help on  Strunz Class: Strunz Class: 08.FC.25 08 - PHOSPHATES, ARSENATES, VANADATES
  08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates
  08.FC -Polyphosphates, etc., with H2O only
08.FC.25 Wooldridgeite! Na2CaCu2(P2O7)2•10(H2O) F dd2 mm2

Other Wooldridgeite Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(Eur. J. Min.,Vol.10,1998) OPTIC PROP.(MinRec, V 31, No. 2)
Help on See Also: See Also: Links to other databases for Wooldridgeite :
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: 08.FC.25





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