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General Creaseyite Information |
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 Chemical Formula: |
Pb2Cu2(Fe+++,Al)2Si5O17•6(H2O) | ||
| 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 | |||
| Empirical Formula: |
Pb2Cu2Fe3+1.75Al0.25Si5O17•6(H2O) | ||
| Environment: |
Found in the oxidation zones. | ||
| IMA Status: |
Approved IMA 1975 | ||
| Locality: |
Mammoth mine, Tiger, Pinal County, Arizona, USA. Link to MinDat.org Location Data. | ||
| 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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Images:
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Images:
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Creaseyite Crystallography |
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| Axial Ratios: |
a:b:c =0.584:1:0.3407 | ||
| Cell Dimensions: |
a = 12.483, b = 21.375, c = 7.283, Z = 4; V = 1,943.28 Den(Calc)= 3.99 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P mmm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 10.726(1), 3.013(0.6), 6.024(0.5), | ||
Physical Properties of Creaseyite |
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| Color: |
Green, Yellowish green. | ||
| Density: |
4.1 | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Habit: |
Spherical - Spherical, rounded aggregates. | ||
| Hardness: |
2.5 - Finger Nail | ||
| Streak: |
light green | ||
Optical Properties of Creaseyite |
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| 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 |
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| Optical Data: |
Biaxial (+), a=1.737, b=1.747, g=1.768, bire=0.0310, 2V(Calc)=70, 2V(Meas)=69. | ||
| Pleochroism (x): |
pale yellowish green. | ||
| Pleochroism (y): |
yellowish green. | ||
| Pleochroism (z): |
yellowish green. | ||
Calculated Properties of Creaseyite |
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| Electron Density: |
Bulk Density (Electron Density)=3.67 gm/cc note: Specific Gravity of Creaseyite =3.99 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.08 Boson Index = 0.92 |
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| Photoelectric: |
PECreaseyite = 600.78 barns/electron U=PECreaseyite x rElectron Density=2,206.03 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Creaseyite is Not Radioactive |
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Creaseyite Classification |
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| Dana Class: |
78.07.02.01 (78)Unclassified silicates | ||
| (78.07)wholly unclassified silicates | |||
| (78.07.02)Dana Group | |||
| Strunz Class: |
09.HH.15 09 - SILICATES (Germanates) | ||
| 09.H - Unclassified Silicates | |||
| 09.HH -With Pb | |||
Other Creaseyite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| 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 Search for Creaseyite using: Visit our Advertisers for Creaseyite : A Bijoux Google Search for CreaseyiteAdam's Minerals Google Search for Creaseyite Cape Minerals Google Search for Creaseyite Dakota Matrix Minerals Google Search for Creaseyite Excalibur Mineral Corp. Google Search for Creaseyite Exceptional Minerals Google Search for Creaseyite John Betts Fine Minerals Search for Creaseyite McDougall Minerals Google Search for Creaseyite Mineral News Website Link Rock and Mineral Shows Google Search for Creaseyite Weinrich Minerals, Inc. Google Search for Creaseyite Ask about Creaseyite here : Print or Cut-and-Paste your Creaseyite Specimen Label here :
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