Database of Zeolite Structures
 

Framework Type EAB
Type Material
  Material Name: TMA-E (Aiello and Barrer)    
 
Chemical Formula:
 
|(C4H12N+)2Na+7 (H2O)26| [Al9Si27 O72]-EAB
C4H12N+ = tetramethylammonium
 
   
Unit Cell:
 
hexagonal

 P 63/m m c (# 194)
    a = 13.2800Å b = 13.2800Å c = 15.2100Å  
    α = 90.000 ° β = 90.000° γ = 120.000°  
   
Framework density:
 
15.5 T/1000 Å3
 
 
Channels:
 
[001] 8 3.7 x 5.1** (2-dimensional)
   
References:
    Aiello, R. and Barrer, R.M.
   "Hydrothermal Chemistry of Silicates. Part XIV. Zeolite Crystallisation in Presence of Mixed Bases"
   J. Chem. Soc. (A), , 1470-1475 (1970)
Meier, W.M. and Groner, M.
   "Zeolite Structure Type EAB: Crystal Structure and Mechanism for the Topotactic Transformation of the Na, TMA Form"
   J. Solid State Chem., 37, 204-218 (1981)
 
 
Name and Code derivation:
    TMA-E (Aiello and Barrer)
  EAB
Limiting Rings
 
8-ring viewed normal to [001]