Database of Zeolite Structures
 

Framework Type *-EWT
Reference Material
  Material Name: EMM-23    
 
Chemical Formula:
 
|(PDPP+2)3| [Si64O116(OH)24]-*-EWT
PDPP+2 = C19H40N2+2 = 1,1-(pentane-1,5-diyl)bis(1-propylpyrrolidinium) ion
= 1-Propyl-1-[5-(1-propylpyrrolidin-1-ium-1-yl)pentyl]pyrrolidin-1-ium
SMILES: CCC[N+]1(CCCC1)CCCCC[N+]2(CCCC2)CCC   Images:  stick or 3D
 
   
Unit Cell:
 
trigonal

 P 3 1 c (# 159)
    a' = 19.7479 Å b' = 19.7479 Å c' = 13.8584 Å  
    α' = 90.000° β' = 90.000° γ' = 120.000°  
   
Framework Density:
 
13.7 T/1000 Å3
 
 
Channels:
 
[001] 21 4.6 x 10.8* <-> [120] 10 5.1 x 5.1**
Dimensionality
  Sorption (molecular cross section > 3.4Å): 3-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
   
References:
  Willhammar, T., Burton, A.W., Yun, Y., Sun J., Afeworki, M., Strohmaier, K.H., Vroman, H. and Zou, X.
  "EMM-23: a stable high-silica multidimensional zeolite with extra-large trilobe-shaped channels"
J. Am. Chem. Soc., 136, 13570-13573 (2014)
 
 
Name and Code derivation:
    Exxon-Mobil Material - twenty-three
  EMM-23 (twenty-three)
  *-EWT
Limiting Rings
 
21-ring viewed along [001]

10-ring viewed along [120]