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Leadhillite

Named for its type locality at the Susanna mine at Leadhills in Scotland. Leadhillite is an uncommon mineral in oxidized lead deposits and in addition to Scotland, can be found in England, Austria, the United States, Namibia, and Australia among several others. Leadhillite can fluoresce a pale yellow under ultraviolet light. It will decompose in hot water. Heating will result in a reversible alteration to susannite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/leadhillite.pdf
- Formula
- Pb4(SO4)(CO3)2(OH)2
- Crystal System
- Monoclinic
- Crystal Habit
- Pseudo Hexagonal, Tabular, Massive - Granular
- Cleavage
- Perfect, Indistinct, None
- Luster
- Adamantine
- Color
- colorless, gray, yellowish, white, light blue
- Streak
- white
- Class
- Monoclinic - Prismatic
- Fracture
- Sectile
- Hardness
- 2.5
- WebMineral
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- Mindat
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Leadhillite from Red Gill mine, Caldbeck Fells, Cumbria, England

Thin, platy, pseudo-hexagonal crystals to less than 1mm.
Leadhillite from Beer Cellar mine, Granby, Newton Co., Missouri, United States

Exceptional pearly white platy Leadhillite in pseudohexagonal crystals to 6mm.
Leadhillite from 510 level, Chalk Mountain mine, Churchill Co., Nevada, United States

Rare specimen for Nevada - Leadhillite, glassy,clear, hexagonal crystal plates to 4mm on Galena and associated with orange Descloizite, Wulfenite and Anglesite.
Leadhillite from Mammoth mine, Tiger, Pinal Co., Arizona, United States

Small specimen but fabulous under the scope with 1-2mm pseudohexagonal crystals with the blue tints of perhaps Caledonite.
Leadhillite from Bisbee, Cochise Co., Arizona, United States

Leadhillite crude platy crystals to over 1cm.
Leadhillite from Tsumeb mine, Tsumeb, Namibia

A small 1cm partial, crystal section. Locality specimen.