Mineralogy Database

Macphersonite Mineral Data

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General Macphersonite Information

Help on Chemical  Formula: Chemical Formula: Pb4(SO4)(CO3)2(OH)2
Help on Composition: Composition: Molecular Weight = 1,078.90 gm
   Hydrogen   0.19 %  H     1.67 % H2O
   Lead      76.82 %  Pb   82.75 % PbO
   Carbon     2.23 %  C     8.16 % CO2
   Sulfur     2.97 %  S     7.42 % SO3
   Oxygen    17.80 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb4(SO4)(CO3)2(OH)2
Help on Environment: Environment: Polymorph of leadhillite and susannite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Leadhills, Lanarkshire, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Harry Gordon Macpherson (1925-), mineralogist at the Royal Scottish Museum, Edinburgh, Scotland.
Help on Name Pronunciation: Name Pronunciation: Macphersonite + Pronunciation Say MACPHERSONITE
Help on Synonym: Synonym: ICSD 54153
  PDF 38-354

Macphersonite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Macphersonite   Linarite

Comments: Colorless macphersonite with blue linarite.
Location: Leadhills, Strathclyde, Scotland, UK. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Macphersonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4489:1:0.4125
Help on Cell Dimensions: Cell Dimensions: a = 10.37, b = 23.1, c = 9.53, Z = 8; V = 2,282.88 Den(Calc)= 6.28
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcab
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.234(1), 2.654(0.9), 2.598(0.3),

Physical Properties of Macphersonite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: White, Pale amber brown, Colorless.
Help on Density: Density: 6.5
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Fluorescent, Short UV=strong yellow, Long UV=strong yellow.
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: white

Optical Properties of Macphersonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1529,KPDmeas= 0.1477,KC= 0.1461
Ncalc = 1.92 - 1.95
Help on Optical Data: Optical Data: Biaxial (-), a=1.87, b=2, g=2.01, bire=0.1400, 2V(Calc)=28, 2V(Meas)=35. Dispersion r > v.

Calculated Properties of Macphersonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.47 gm/cc
note: Specific Gravity of Macphersonite =6.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PEMacphersonite =1,401.45 barns/electron
U=PEMacphersonite x rElectron Density=7,666.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Macphersonite is Not Radioactive

Macphersonite Classification

Help on  Dana Class: Dana Class: (17)Compound Carbonates
  (17.01)with miscellaneous formulae
  (17.01.04)Dana Group Macphersonite Pb4(SO4)(CO3)2(OH)2 Pcab 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.BF.40 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BF -With (Cl), SO4, PO4, TeO3
05.BF.40 Leadhillite Pb4(SO4)(CO3)2(OH)2 P 21/a 2/m
05.BF.40 Macphersonite Pb4(SO4)(CO3)2(OH)2 Pcab 2/m 2/m 2/m
05.BF.40 Susannite Pb4(SO4)(CO3)2(OH)2 R 3 3

Other Macphersonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Macphersonite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 05.BF.40





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