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Pattersonite Mineral Data |
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Pattersonite Mineral Data |
General Pattersonite Information |
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 Chemical Formula: |
PbFe3(PO4)2(OH)4(H2O,OH)2 | |
| Composition: |
Molecular Weight = 667.91 gm | |
| Iron 25.25 % Fe 32.49 % FeO | ||
| Phosphorus 9.18 % P 21.04 % P2O5 | ||
| Hydrogen 1.06 % H 9.44 % H2O | ||
| Lead 31.02 % Pb 32.22 % Pb2O | ||
| Oxygen 33.49 % O | ||
| ______ ______ | ||
| 100.00 % 95.19 % = TOTAL OXIDE | ||
| Empirical Formula: |
PbFe2+3.02(PO4)1.98(OH)5.12(H2O)0.94 | |
| Environment: |
Found in a single, head-sized boulder collected in 1986 on the dumps. Dimorphous with kintoreite. | |
| IMA Status: |
Approved IMA 2005 (Dana # Added) | |
| Locality: |
Grube Vereinigung, near Eisenbach, Taunus, Hesse, Germany. Link to MinDat.org Location Data. | |
| Name Origin: |
Named for Arthur Lindo Patterson (1902-1966), a crystallographer who developed a method employing a Fourier series to generate a three-dimensional function, the now well-known "Patt erson function" in crystal-structure d | |
| Synonym: |
IMA2005-049 | |
Pattersonite Crystallography |
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| Axial Ratios: |
a:b:c =0.7361:1:1.0194 | |
| Cell Dimensions: |
a = 5.307, b = 7.209, c = 7.349, Z = 1; alpha = 87.75°, beta = 86.36°, gamma = 71.42° V = 265.76 Den(Calc)= 4.17 | |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 | |
| X Ray Diffraction: |
By Intensity(I/Io): 4.848(1), 6.839(0.64), 3.547(0.57),3.417(0.52), 3.022(0.51), 3.667(0.47), 2.8339(0.45), | |
Physical Properties of Pattersonite |
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| Cleavage: |
{???} Poor | |
| Color: |
Yellow. | |
| Density: |
4.04 | |
| Diaphaneity: |
Translucent | |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | |
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. | |
| Hardness: |
4.5 - Between Fluorite and Apatite | |
| Luster: |
Adamantine | |
| Streak: |
very pale yellow | |
Optical Properties of Pattersonite |
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| Gladstone-Dale: |
CI meas= -0.696 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.643 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2164,KPDmeas= 0.2233,KC= 0.1317 Ncalc = 1.53 - 1.55 |
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| Optical Data: |
Biaxial (-), a=1.86, b=1.917, g=1.93, bire=0.0700 | |
Calculated Properties of Pattersonite |
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| Electron Density: |
Bulk Density (Electron Density)=3.86 gm/cc note: Specific Gravity of Pattersonite =4.17 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.07 Boson Index = 0.93 |
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| Photoelectric: |
PEPattersonite = 523.02 barns/electron U=PEPattersonite x rElectron Density=2,018.41 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Pattersonite is Not Radioactive |
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Pattersonite Classification |
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| Dana Class: |
30.02.10.01 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen | |
| (30.02)where (A B)2 XO4 Zq | ||
| (30.02.10)Dana Group | ||
| Strunz Class: |
08.BL.25 08 - PHOSPHATES, ARSENATES, VANADATES | |
| 08.B - Phosphates, etc. with Additional Anions, without H2O | ||
| 08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1 | ||
Other Pattersonite Information |
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| References: |
NAME( AmMin, v94:402) PHYS. PROP.(AmMin, v94:402) OPTIC PROP.(AmMin, v94:402) | |
| See Also: |
Links to other databases for Pattersonite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Pattersonite using: Visit our Advertisers for Pattersonite : Ask about Pattersonite here : Print or Cut-and-Paste your Pattersonite Specimen Label here :
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