Lanarkite Mineral Data

Lanarkite Mineral Data +

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General Lanarkite Information

Chemical Formula:

Pb2(SO4)O

Composition:

Molecular Weight = 526.46 gm

Lead 78.71 % Pb 84.79 % PbO

Sulfur 6.09 % S 15.21 % SO₃

Oxygen 15.20 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₂(SO₄)O

Environment:

Secondary mineral developed in galena ores.

IMA Status:

Valid Species (Pre-IMA) 1832

Locality:

Susanna Mine, Leadhills, Lanarkshire, Scotland. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Synonym:

ICSD 29268

PDF 33-1486

Lanarkite Image

Images:

Lanarkite

Comments: White, acicular spray of lanarkite on matrix.
Location: Meadowfoot smelter, Wanlockhead, Lanarkshire, Scotland. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Lanarkite

Comments: Cleaved crystals of greenish beige lanakite on matrix.
Location: Leadhills, Scotland. Scale: Picture size 2 cm.
© Dave Barthelmy

Lanarkite Crystallography

Axial Ratios:

a:b:c =2.4131:1:1.2404

Cell Dimensions:

a = 13.746, b = 5.6964, c = 7.066, Z = 4; beta = 115.79° V = 498.18 Den(Calc)= 7.02

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.3426(1), 2.9614(0.8), 2.848(0.45),

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Forms: [ 1 1 1] [ 1 1 0] [ 2 0 1] [ 4 0 1] [ 2 0 1] [ 0 0 1]

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Physical Properties of Lanarkite

Cleavage:

[201] Perfect, [401] Indistinct, [201] Indistinct

Color:

Greenish white, Gray, Gray white, Yellow, Light yellow.

Density:

6.92

Diaphaniety:

Transparent to Translucent

Fracture:

Flexible - Flexible fragments.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Fluorescent.

Luster:

Adamantine - Resinous

Streak:

white

Optical Properties of Lanarkite

Gladstone-Dale:

CI meas= -0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1411,KPDmeas= 0.1431,KC= 0.1397

Optical Data:

Biaxial (-), a=1.928, b=2.007, g=2.036, bire=0.1080

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Lanarkite

Electron Density:

r_electron=5.87 gm/cc
note: r_Lanarkite=7.02 gm/cc.

Fermion Index

Fermion Index = 0.17448
Boson Index = 0.82552

Photoelectric:

PE_Lanarkite=1,446.22 barns/electron
U=PE_Lanarkite x r_electron=8,485.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lanarkite is Not Radioactive

Lanarkite Classification

Dana Class:

30.2.1.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.2)where (A B)2 XO4 Zq

(30.2.1)Dana Group

30.2.1.1 Lanarkite Pb2(SO4)O C 2/m 2/m

Strunz Class:

VI/B.13-10 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations

VI/B.13 - Lanarkite - Susannite series

VI/B.13-10 Lanarkite Pb2(SO4)O C 2/m 2/m

VI/B.13-20 Olsacherite Pb2(SeO4)(SO4) P 2212 2 2 2

VI/B.13-30 Grandreefite Pb2SO4F2 A2/a 2/m

VI/B.13-40 Pseudograndreefite Pb6SO4F1O F 222 2 2 2

VI/B.13-50 Leadhillite Pb4(SO4)(CO3)2(OH)2 P 2₁/a 2/m

VI/B.13-60 Macphersonite Pb4(SO4)(CO3)2(OH)2 Pcab 2/m 2/m 2/m

VI/B.13-70 Susannite Pb4(SO4)(CO3)2(OH)2 R 3 3

Other Lanarkite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Lanarkite

Pb2(SO4)O
Dana No: 30.2.1.1 Strunz No: VI/B.13-10
Locality:

Notes: