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Creaseyite Mineral Data

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General Creaseyite Information

Help on Chemical  Formula: Chemical Formula: Pb2Cu2(Fe+++,Al)2Si5O17•6(H2O)
Help on Composition: Composition: Molecular Weight = 1,166.48 gm
   Aluminum   0.58 %  Al    1.09 % Al2O3
   Iron       8.38 %  Fe   11.98 % Fe2O3
   Copper    10.90 %  Cu   13.64 % CuO
   Silicon   12.04 %  Si   25.75 % SiO2
   Hydrogen   1.04 %  H     9.27 % H2O
   Lead      35.53 %  Pb   38.27 % PbO
   Oxygen    31.55 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Cu2Fe3+1.75Al0.25Si5O17•6(H2O)
Help on Environment: Environment: Found in the oxidation zones.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Mammoth mine, Tiger, Pinal County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for S. C. Creasey (1917-), in recognition of his studies of the Mammoth-St. Anthony mine.

Creaseyite Image

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Comments: Sparse light green micro crystalline creaseyite on crystalline quartz.
Location: Navajoa, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Comments: Green acicular sprays of creaseyite to 0.5mm on matrix.
Location: Rawhide mine, Mohave County, Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Creaseyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.584:1:0.3407
Help on Cell Dimensions: Cell Dimensions: a = 12.483, b = 21.375, c = 7.283, Z = 4; V = 1,943.28 Den(Calc)= 3.99
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.726(1), 3.013(0.6), 6.024(0.5),

Physical Properties of Creaseyite

Help on Color: Color: Green, Yellowish green.
Help on Density: Density: 4.1
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Streak: Streak: light green

Optical Properties of Creaseyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1881,KPDmeas= 0.1831,KC= 0.1992
Ncalc = 1.79 - 1.82
Help on Optical Data: Optical Data: Biaxial (+), a=1.737, b=1.747, g=1.768, bire=0.0310, 2V(Calc)=70, 2V(Meas)=69.
Help on Pleochroism (x): Pleochroism (x): pale yellowish green.
Help on Pleochroism (y): Pleochroism (y): yellowish green.
Help on Pleochroism (z): Pleochroism (z): yellowish green.

Calculated Properties of Creaseyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.67 gm/cc
note: Specific Gravity of Creaseyite =3.99 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PECreaseyite = 600.78 barns/electron
U=PECreaseyite x rElectron Density=2,206.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Creaseyite is Not Radioactive

Creaseyite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.02)Dana Group Creaseyite Pb2Cu2(Fe,Al)2Si5O17•6(H2O) P mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.HH.15 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HH -With Pb
09.HH.15 Creaseyite Pb2Cu2(Fe,Al)2Si5O17•6(H2O) P mmm 2/m 2/m 2/m

Other Creaseyite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Creaseyite :
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

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Dana No: Strunz No: 09.HH.15





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