Pattersonite Mineral Data

General Pattersonite Information

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

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Pattersonite Crystallography

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 - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

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Kolitsch U , Bernhardt H-J , Krause W , Blass G , European Journal of Mineralogy , 20 (2008) p.281-288, Pattersonite, PbFe3(PO4)2(OH)4[(H2O)0.5(OH)0.5]2, a new supergene phosphate, mineral: description and crystal structure, Locality: Grube Vereinigung, near Eisenbach, Taunus, Hesse, Germany

Physical Properties of Pattersonite

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

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

Optical Data:

Biaxial (-), a=1.86, b=1.917, g=1.93, bire=0.0700

Calculated Properties of Pattersonite

Electron Density:

Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Pattersonite =4.17 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Pattersonite= 523.02 barns/electron
U=PE_Pattersonite x rElectron Density=2,018.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pattersonite is Not Radioactive

Pattersonite Classification

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

30.02.10.01 Pattersonite! PbFe3(PO4)2(OH)4(H2O,OH)2 P1 1

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

08.BL.25 Pattersonite! PbFe3(PO4)2(OH)4(H2O,OH)2 P1 1

Other Pattersonite Information

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

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Print or Cut-and-Paste your Pattersonite Specimen Label here :

Pattersonite

PbFe3(PO4)2(OH)4(H2O,OH)2
Dana No: 30.02.10.01 Strunz No: 08.BL.25
Locality:

Notes: