Mineral Information and Data:

Susannite
Pb4(SO4)(CO3)2(OH)2 [CNMNC approved formula]

Named for the locality: Susanna mine, Leadhills, Lanarkshire, Scotland.

IMA status : Valid species (Pre-IMA 1845) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
17.01.03.01  
  (17) Compound Carbonates
  (17.01) with miscellaneous formulae
  (17.01.03)
  
Nickel-Strunz
(10th edition) :
05.BF.40
  (05) Carbonates and Nitrates
  (05.B) Carbonates with additional anions, without H2O
  (05.BF) With (Cl), SO4, PO4, TeO3
  
Crystal system: Trigonal System
Point group (H-M): 3 — rhombohedral
  
  
  

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