Mineral Information and Data:

Katoite
Ca3Al2(SiO4)3-x(OH)4x(x=1.5to3.0) [CNMNC approved formula]

Named for Akira Kato, mineralogist of the National Science Museum, Tokyo, Japan.

IMA status : Approved Species 1984 ()
CLASSIFICATION 
Dana
(8th edition) :
51.04.03d.02  
  (51) Nesosilicate Insular SiO4 Groups Only
  (51.04) with cations in [6] and >[6] coordination
  (51.04.03d) Garnet group (Hydrogarnet)
  
Nickel-Strunz
(10th edition) :
09.AD.25
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AD) Nesosilicates without additional anions; cations in [6] and/or greater coordination
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
  
  
  

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