Anglesite Mineral Data

Anglesite Mineral Data +

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General Anglesite Information

Chemical Formula:

PbSO4

Composition:

Molecular Weight = 303.26 gm

Lead 68.32 % Pb 73.60 % PbO

Sulfur 10.57 % S 26.40 % SO₃

Oxygen 21.10 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb(SO₄)

Environment:

Secondary, weathered deposits of lead ore.

IMA Status:

Valid Species (Pre-IMA) 1832

Locality:

Tsumeb, Southwest Africa. Link to MinDat.org Location Data.

Name Origin:

Named after the island of Anglesey (Wales, Great Britain).

Synonym:

ICSD 100625

Lead Spar

Lead Vitrol

PDF 36-1461

Anglesite Image

Images:

Anglesite

Comments: Crystalline anglesite with minor duftite. The crystal at the top of the specimen is partially doubly terminated.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: 2.7 x 2.1 cm.
© John Veevaert

Images:

Anglesite

Comments: White anglesite crystals with dark gray posnjackite.
Location: (1st Oxidation Zone), Tsumeb, Namibia. Scale: 8.5 x 5 x 4 cm.
© John Schneider

Anglesite Crystallography

Axial Ratios:

a:b:c =1.5709:1:1.2889

Cell Dimensions:

a = 8.48, b = 5.398, c = 6.958, Z = 4; V = 318.50 Den(Calc)= 6.32

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm

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

By Intensity(I/I_o): 3.001(1), 4.26(0.87), 3.333(0.86),

Forms:

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

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Crystal Structure:

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Miyake M , Minato I , Morikawa H , Iwai S I , American Mineralogist , 63 (1978) p.506-510, Crystal structure and sulphate force constants of barite, celesite, and, anglesite

View Additional jPOWD Structure files for Anglesite
[1]

Physical Properties of Anglesite

Cleavage:

[001] Good, [210] Distinct

Color:

Blue, Colorless, Green, Gray, Yellow.

Density:

6.3

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).

Hardness:

2.5-3 - Finger Nail-Calcite

Luminescence:

None.

Luster:

Adamantine

Streak:

white

Optical Properties of Anglesite

Gladstone-Dale:

CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1401,KPDmeas= 0.1405,KC= 0.1446

Optical Data:

Biaxial (+), a=1.878, b=1.883, g=1.895, bire=0.0170, 2V(Calc)=68, 2V(Meas)=75.4. Dispersion relatively strong.

Calculated Properties of Anglesite

Electron Density:

r_electron=5.40 gm/cc
note: r_Anglesite=6.30 gm/cc.

Fermion Index

Fermion Index = 0.15188
Boson Index = 0.84812

Photoelectric:

PE_Anglesite=1,224.10 barns/electron
U=PE_Anglesite x r_electron=6,611.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Anglesite is Not Radioactive

Anglesite Classification

Dana Class:

28.3.1.3 (28)Anhydrous Acid and Sulfates

(28.3)(A++) XO4

(28.3.1)Barite Group

28.3.1.1 Barite BaSO4 Pbnm 2/m 2/m 2/m

28.3.1.2 Celestine SrSO4 Pbnm 2/m 2/m 2/m

28.3.1.3 Anglesite PbSO4 Pbnm 2/m 2/m 2/m

Strunz Class:

VI/A.09-50 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/A - Waterfree sulfates [SO4]2- without unfamiliar anions. cations of very big size

VI/A.09 - Barite group

VI/A.09-10 Celestine SrSO4 Pbnm 2/m 2/m 2/m

VI/A.09-20 Barite BaSO4 Pbnm 2/m 2/m 2/m

VI/A.09-30 Hashemite Ba(Cr,S)O4 P nma 2/m 2/m 2/m

VI/A.09-40 Kerstenite* PbSeO4(?) P nma 2/m 2/m 2/m

VI/A.09-50 Anglesite PbSO4 Pbnm 2/m 2/m 2/m

Other Anglesite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)

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

Anglesite

PbSO4
Dana No: 28.3.1.3 Strunz No: VI/A.09-50
Locality:

Notes: