Anglesite Mineral Data

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).

Name Pronunciation:

Anglesite + Pronunciation

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 - Dipyramidal H-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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Physical Properties of Anglesite

Cleavage:

{001} Good, {210} Distinct

Color:

Blue, Colorless, Green, Gray, Yellow.

Density:

6.3

Diaphaneity:

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:

Fluorescent, Long UV=orange-yellow pink.

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
Ncalc = 1.91

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:

Bulk Density (Electron Density)=5.40 gm/cc
note: Specific Gravity of Anglesite =6.30 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

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

Radioactivity:

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

Anglesite Classification

Dana Class:

28.03.01.03 (28)Anhydrous Acid and Sulfates

(28.03)(A++) XO4

(28.03.01)Barite Group

28.03.01.01 Barite BaSO4 Pbnm 2/m 2/m 2/m

28.03.01.02 Celestine SrSO4 Pbnm 2/m 2/m 2/m

28.03.01.03 Anglesite PbSO4 Pbnm 2/m 2/m 2/m

Strunz Class:

07.AD.35 07 - SULFATES (SELENATES, TELLURATES)

07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O

07.AD -With only large cations

07.AD.35 Anglesite PbSO4 Pbnm 2/m 2/m 2/m

07.AD.35 Barite BaSO4 Pbnm 2/m 2/m 2/m

07.AD.35 Celestine SrSO4 Pbnm 2/m 2/m 2/m

07.AD.35 Olsacherite Pb2(SeO4)(SO4) P 2212 2 2 2

07.AD.35 Radiobarite* (Ba,Ra)SO4 2/m 2/m 2/m

Other Anglesite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Mason68)

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

Anglesite

PbSO4
Dana No: 28.03.01.03 Strunz No: 07.AD.35
Locality:

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