General Information:
Chemical Formula:Pb4(CO3)Cl6·(H2O)
Composition:(Molecular Weight = 1,119.54 gm)Hydrogen 0.18 %
H Lead 74.03 %
PbCarbon 1.07 %
C Chlorine 19.00 %
ClOxygen 5.72 %
O Empirical Formula: Pb4(CO3)Cl6·(H2O)
Environment:Quartz-dolomite ore vein exposed to sea water at the base of the cliff.
IMA Status:Approved IMA 1989
Locality:Bounds Cliff, St. Endellion, Cornwall, England.
Name Origin:Named for Richard William Barstow (1947-1982), Cornish mineral dealer.
Physical Properties: Cleavage:[???] Indistinct
Color:colorless or white.
Density:5.5 - 5.69, Average = 5.59
Diaphaniety:Transparent
Habits:Microscopic Crystals - Crystals visible only with microscopes., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:3 - Calcite
Luster:Adamantine
Streak:white
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