Mineral Information and Data:

Shannonite
Pb2O(CO3) [CNMNC approved formula]

Named for David M. Shannon (1942- ), a mineral dealer who helped collect the first samples of the mineral.

IMA status : Approved Species 1993 ()
CLASSIFICATION 
Dana
(8th edition) :
16a.03.10.01  
  (16a) Carbonates - Hydroxyl or Halogen
  (16a.03) where (A B)2 (XO3) Zq
  (16a.03.10)
  
Nickel-Strunz
(10th edition) :
05.BE.05
  (05) Carbonates and Nitrates
  (05.B) Carbonates with additional anions, without H2O
  (05.BE) With Pb, Bi
  
Crystal system: Orthorhombic System
Point group (H-M): 222 — disphenoidal
  
  
  

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