Database of Zeolite Structures
 

Framework Type DDR
Reference Material
  Material Name: Deca-dodecasil 3R    
 
Chemical Formula:
 
|(AdaA)6 (N2)9 | [Si120O240]-DDR
AdaA = C10H17N = 1-aminoadamantane = adamantan-1-amine
SMILES: C1C2CC3CC1CC(C2)(C3)N   Images:  stick or 3D
 
   
Unit Cell:
 
trigonal

 R -3 m (# 166)
    a' = 13.8600 Å b' = 13.8600 Å c' = 40.8910 Å  
    α' = 90.000° β' = 90.000° γ' = 120.000°  
   
Framework Density:
 
17.6 T/1000 Å3
 
 
Channels:
 
[001] 8 3.6 x 4.4**
Dimensionality
  Sorption (molecular cross section > 3.4Å): 2-dimensional
  Topological (pore opening > 6-ring): 2-dimensional
   
References:
  Gies, H.
  "Studies on clathrasils. IX. Crystal structure of deca-dodecasil 3R, the missing link between zeolites and clathrasils"
Z. Kristallogr., 175, 93-104 (1986)
DOI: 10.1524/zkri.1986.175.1-2.93
 
 
Name and Code derivation:
    Deca- and dodecahedra, 3 layers, rhombohedral
  Deca-dodecasil 3R
  DDR
Limiting Rings
 
8-ring viewed normal to [001]