Database of Zeolite Structures
 

Framework Type ETR
Reference Material
  Material Name: ECR-34    
 
Chemical Formula:		  
|H1.2K6.3Na4.4 | [Ga11.6Al0.3Si36.1O96]-ETR		  
   
Unit Cell: 		 
hexagonal
 P 63 m c (# 186)
    a' = 21.0300 Å b' = 21.0300 Å c' = 8.5300 Å  
    α' = 90.000° β' = 90.000° γ' = 120.000°  
   
Framework Density: 		 
14.7 T/1000 Å3
 
  
Channels: 		 
[001] 18 10.1 x 10.1* <-> [001] 8 2.5 x 6.0**
Dimensionality
  Sorption (molecular cross section > 3.4Å): 1-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
   
References:
  Strohmaier, K. G. and Vaughan, D.E.W.
  "Structure of the first silicate molecular sieve with 18-ring pore openings, ECR-34"
J. Am. Chem. Soc., 125, 16035-16039 (2003)
 
  
Name and Code derivation:
    Exxon Cooperate Research - thirty-four
  ECR-34 (thirty-four)
  ETR
Limiting Rings
 
18-ring viewed along [001]

8-ring viewed normal to [001]


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