Database of Zeolite Structures
 

Framework Type NAT
Reference Material
  Material Name: Natrolite    
 
Chemical Formula:
 
|Na8 (H2O)8|2 [Al8Si12O40]2-NAT
 
   
Unit Cell:§
 
orthorhombic

 F d d 2 (# 141)
    a' = 18.3000 Å b' = 18.6300 Å c' = 6.6000 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
(Relationship to unit cell of Framework Type: a' = b' = a ยท sqrt(2), c' = c
or, as vectors, a' = a + b, b' = b - a, c' = c)
   
Framework Density:
 
17.8 T/1000 Å3
 
 
Channels:
 
[001] 9 2.5 x 4.1* <-> <100> 8 2.6 x 3.9**
Dimensionality
  Sorption (molecular cross section > 3.4Å): 0-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
   
References:
  Pauling, L.
  "The structure of some sodium and calcium aluminosilicates"
Proc. Natl. Acad. Sci., 16, 453-459 (1930)
Material name:   Natrolite
Chemical formula:   [Al8Si12O40]2-NAT
  § Meier, W.M.
  "The crystal structure of natrolite "
Z. Kristallogr., 113, 430-444 (1960)
 
 
Name and Code derivation:
    Nat rolite
  NAT
 
 
§ Chemical Formula and Unit Cell taken from the reference marked with this sign
Limiting Rings
 
8-ring viewed along <100>

9-ring viewed along [001]