Mineral Information and Data:

Corrensite
(Ca,Na,K)1-x(Mg,Fe,Al)9(Si,Al)8O20(OH)10 • nH2O [CNMNC approved formula]

Named for Carl Whilom Correns (1893-1980), German mineralogist and director of the Sedimentary Petrology Institute, University of Gottingen.

IMA status : Valid species (Pre-IMA 1954) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
71.04.02.05  
  (71) Phyllosilicate Sheets of Six-Membered Rings
  (71.04) interlayered 1:1, 2:1, and octahedra
  (71.04.02) Interstratified Chlorite-Smectite group
  
Nickel-Strunz
(10th edition) :
09.EC.60
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EC) Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
  
Crystal system: Orthorhombic System
Point group (H-M): Unknown — Unk
  
  
  

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