Cerussite and Anglesite

ID	48
Mineral	Cerussite Anglesite
Location	Chaillac Mine - Chaillac - Centre-Val de Loire - France
Fluorescence	LW-UV: close SW-UV: close
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Mindat data

ID	934
Long ID	1:1:934:4
Formula	`Pb(CO₃)`
IMA Status	0 1
Other Occurrences	Commonly occurs in the upper oxidized zones of base metal deposits, especially lead-silver deposits.
Industrial	Ore of lead, and often also of silver.
Diapheny	Transparent,Translucent
Cleavage	On {110} and {021} distinct; on {010} and {012} in traces.
Tenacity	very brittle
Colour	Colourless, white, gray, blue, or green; colourless in transmitted light
Hardness (min)	3.0
Hardness (max)	3.5
Luminescence	None
Lustre	Adamantine
About the name	Named in 1845 by Wilhelm Karl von Haidinger from the Latin, cerussa, meaning "white lead."
Streak	White
Crystal System	Orthorhombic
Cleavage Type	Distinct/Good
Fracture type	Conchoidal
Morphology	Crystal morphology extremely varied. Simple crystals often tabular {010} and elongated [001] or [100]. Also equant or dipyramidal and then pseudo-hexagonal. Rarely acicular [001] or very thin tabular {001}. {010} and {0kl} usually striated [100]; {111} often striated [1_10] or [11_2]. Reticular twin aggregates common. Massive, granular, dense, compact. Stalactitic at times; powdery to earthy. Fibrous rare.
Twinning	Almost universal. Most commonly on {110}, as twin lamellae or as contact twin types producing stellate pseudo-hexagonal groups or reticulated aggregates. On {130} less common, mainly as contact twins with a heart-shaped outline. Both laws may occur simultaneously.
UV	Occasionally fluorescent under SW and MW UV lights showing a yellow color. Yellow/white under SW UV light, but less intense.
Thermal Behaviour	Breaks down to a basic carbonate at about 300°, which, in turn, decomposes to PbO at about 500° (?). According to Grisafe & White (1964) cerussite decomposes: - at ca. 204 °C, according to reaction: 3PbCO₃ ⇌ 2Pb₂O(CO₃) + CO₂ Further reactions: - at ca. 283 °C: 2Pb₃O(CO₃)₂ ⇌ 3Pb₂O(CO₃) + CO₂ - at 373 °C: 3Pb₂O(CO₃)⇌ 2Pb₃O₂(CO₃) + CO₂ - at 435 °C: Pb₃O₂(CO₃) ⇌ 3PbO + CO₂
key_elements	0
shortcode_ima	Cer
Group	Aragonite Group

ID	233
Long ID	1:1:233:2
Formula	`Pb(SO₄)`
IMA Status	0 1
Industrial	Ore of lead.
Discovery Year	1832
Diapheny	Transparent,Translucent,Opaque
Cleavage	Good on {001}, distinct on {201}; on {010} in traces.
Tenacity	brittle
Colour	Colorless to white, often tinted grey, yellow, green or blue; colourless in transmitted light.
Hardness (min)	2.5
Hardness (max)	3.0
Luminescence	Often flouresces yellow under LW UV.
Lustre	Adamantine to resinous, or vitreous.
About the name	Named in 1832 by Francois Sulpice Beudant for the type locality, the Parys Mine on the Island of Anglesey (Ynys Môn) in Wales, U.K.
Streak	Colorless
Crystal System	Orthorhombic
Cleavage Type	Distinct/Good
Fracture type	Conchoidal
Morphology	Crystals frequently thin to thick tabular {001}, commonly with {210}, {101} and rhomboidal in outline. Also extended [100] or [010] at times. Prismatic [001] with large {210} and vertically striated; prismatic [100], with large {011}; stout prismatic [010], with {101}, {102}; tabular {100}; equant or pyramidal with {111}, {211} or otherwise. {100} and {210} commonly striated [001]. Massive; granular to compact; nodular; stalactitic.
Twinning	None observed.
UV	Shades of yellow and golden-yellow (UV).
Thermal Behaviour	Inverts to a monoclinic polymorph at about 864°C. Decomposes between 900°C and 1000°C.
key_elements	0
shortcode_ima	Ang
Group	Baryte Group

Price: € 10

Dimensions: Not registered

Weight: Not registered

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Notes:

Symbol	Element
C	Carbon
O	Oxygen
Pb	Lead
S	Sulfur

Cerussite and Anglesite

Mindat data

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