Mineral Information and Data:

Minnesotaite
Fe2+3Si4O10(OH)2 [CNMNC approved formula]

Named after its occurrence in Minnesota, USA.

IMA status : Valid species (Pre-IMA 1944) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
71.02.01.05  
  (71) Phyllosilicate Sheets of Six-Membered Rings
  (71.02) with 2:1 Layers
  (71.02.01) Pyrophyllite-talc group
  
Nickel-Strunz
(10th edition) :
09.EC.05
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EC) Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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