Mineral Information and Data:

Phosgenite
Pb2CO3Cl2 [CNMNC approved formula]

Named from gas phosgene, which contains some of the same elements.

IMA status : Valid species (Pre-IMA 1841) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
16a.03.04.01  
  (16a) Carbonates - Hydroxyl or Halogen
  (16a.03) where (A B)2 (XO3) Zq
  (16a.03.04)
  
Nickel-Strunz
(10th edition) :
05.BE.20
  (05) Carbonates and Nitrates
  (05.B) Carbonates with additional anions, without H2O
  (05.BE) With Pb, Bi
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
Unit cell: a = 8.111 Å, c = 8.824 Å
Crystal Habit: Crystals short to long prismatic or thick tabular, massive, granular
  
Color: Colorless, white, yellowish white, gray, brown, greenish
Diaphaneity: Transparent, Translucent
Luster: Adamantine
Hardness (Mohs): 2 to 3
Measured Density: 6.133 g/cm3
Cleavage: 3; {001} and {110} distinct, {100} indistinct
Tenacity: Sectile, flexible ⊥ [001]
Fracture: Conchoidal
Streak: White
  
Geologic Setting: Uncommon, typically formed by alteration of galena in the oxidized zone of hydrothermal lead deposits, or by reaction of sea water with other lead minerals.
Mineral Association: Cerussite, anglesite, matlockite, laurionite
  
Synonyms/varieties: Galenoceratite
Luminescent Properties: May fluoresce yellow under LW UV, X-rays, and electron beams.
Other Properties: Gemstone Extremely Rare.

 

Phosgenite
Origin: Monteponi, near Iglesias, Sardinia, Italy
Sample size: 4 x 3.5 x 2 cm
Photo: Tom Loomis

 

Phosgenite
(zoom-in of above)

 

Phosgenite
Phosgenite and anglesite
Origin: Laurium, Greece
Sample size: Microscopic image
Photo and Owner: Lou Perloff

 

Phosgenite
Origin: Monteponi Mine, Sardinia, Italy
Sample size: 5.6 x 4.9 x 4.4 cm
Photo: Rob Lavinsky

<<< BACK TO MINERAL SEARCH