Mineral - Anglesite
Anglesite
Chemical Properties
Mineral Class
Sulphates
Toxicity
middle
Formula
Pb[SO₄]
Unit Cell
a=8.48 b=5.40 c=6.96 Z=4
Physical Properties
Hardness
2.5 - 3
Streak
white
Density
Very Heavy (>6)
Cleavage
Good after {100}, good after {210} distinct after {010}
Fracture
conchoidal
Tenacity
Brittle
Optical Properties
Color
whitegrayyellowgreencolorless
Birefringence
0.017
Luster
Greasy,
Adamantine
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Pnma (62)
Habit
blocky, dipyramidal, granular, crusty, prismatic, spear-shaped, spear-shaped, Rhombohedral, tabular
Formation
Oxidation zone of lead deposits (e.g. from galena)
Paragenesis
Twinning
Rarity
Common
Synonyms
Anglesite
Groups and Members
Baryte-Group
Name and first discovery : Named after the Welsh island of Anglesey, where the mineral was first discovered in 1832.
Chemistry :
Synonyms :
Varieties : Barytoanglesite, Cupro-Anglesite
Abbreviation : Ang