Mineral Information and Data:

Gyrolite
NaCa16(Si23Al)O60(OH)8 • 14H2O [CNMNC approved formula]

Named From the Greek guros = "circle", in allusion to the round form of the crystalline groupings.

IMA status : Valid species (Pre-IMA 1851) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
73.02.02c.01  
  (73) Phyllosilicate Condensed Tetrahedral Sheets
  (73.02) with double and single layers
  (73.02.02c) Reyerite group (Gyrolite Subgroup)
  
Nickel-Strunz
(10th edition) :
09.EE.30
  (09) Silicates
  (09.E) Phyllosilicates
  (09.EE) Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
  
Crystal system: Hexagonal System
Point group (H-M): 6 — pyramidal
  
  
  

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