Mineral Information and Data:

Ludlockite
PbFe3+4As3+10O22 [CNMNC approved formula]

Named for F. Ludlow Smith III and C. Locke Key, mineral collectors and dealers in New Jersy.

IMA status : Approved Species 1970 ()
CLASSIFICATION 
Dana
(8th edition) :
38.05.04.01  
  (38) Anhydrous Phosphates, etc
  (38.05) with miscellaneous formulae
  (38.05.04)
  
Nickel-Strunz
(10th edition) :
04.JA.45
  (04) Oxides and Hydroxides
  (04.J) Arsenites, Antimonites, Bismuthites, Sulfites,
  (04.JA) Arsenites, antimonites, bismuthites; without additional anions, without H2O
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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