Mineralogy Database

Leadhillite Mineral Data

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General Leadhillite 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   88.68 % PbO2
   Carbon     2.23 %  C     8.16 % CO2
   Sulfur     2.97 %  S     7.42 % SO3
   Oxygen    17.80 %  O
            ______        ______ 
            100.00 %      105.93 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb4(SO4)(CO3)2(OH)2
Help on Environment: Environment: Secondary mineral.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Leadhills, Lanarkshire, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the localiy.
Help on Name Pronunciation: Name Pronunciation: Leadhillite + Pronunciation Say LEADHILLITE
Help on Synonym: Synonym: ICSD 64807
  PDF 35-617

Leadhillite Image

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Comments: Clear crystal of leadhillite on matrix.
Location: Leadhills, Lanark, Scotland. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Leadhillite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4373:1:0.5568
Help on Cell Dimensions: Cell Dimensions: a = 9.08, b = 20.76, c = 11.56, Z = 8; beta = 89.8° V = 2,179.06 Den(Calc)= 6.58
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.53(1), 2.917(0.6), 2.605(0.5),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 1 1 0) ( 0 0 1)

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Physical Properties of Leadhillite

Help on Cleavage: Cleavage: {001} Perfect, {100} Indistinct
Help on Color: Color: Colorless, Gray, Yellowish, White, Light blue.
Help on Density: Density: 6.26 - 6.55, Average = 6.4
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
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 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak gray yellow, Long UV=weak grey yellow.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Leadhillite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.164 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.133 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1463,KPDmeas= 0.1503,KC= 0.1291
Ncalc = 1.81 - 1.85
Help on Optical Data: Optical Data: Biaxial (-), a=1.87, b=2.0085, g=2.01, bire=0.1400, 2V(Calc)=10, 2V(Meas)=10. Dispersion relatively strong.

Calculated Properties of Leadhillite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.54 gm/cc
note: Specific Gravity of Leadhillite =6.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PELeadhillite =1,401.45 barns/electron
U=PELeadhillite x rElectron Density=7,760.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Leadhillite is Not Radioactive

Leadhillite Classification

Help on  Dana Class: Dana Class: (17)Compound Carbonates
  (17.01)with miscellaneous formulae
  (17.01.02)Dana Group Leadhillite Pb4(SO4)(CO3)2(OH)2 P 21/a 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 Leadhillite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Leadhillite :
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
17 - YupRocks

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Dana No: Strunz No: 05.BF.40





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