Database of Zeolite Structures
 

Framework Type OBW
Reference Material
  Material Name: OSB-2    
 
Chemical Formula:		  
|K44 (H2O)96| [Be22Si54O152]-OBW		  
   
Unit Cell:§ 		 
tetragonal
 I 4/m m m (# 139)
    a' = 13.7452 Å b' = 13.7452 Å c' = 30.6540 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
   
Framework Density: 		 
13.1 T/1000 Å3
 
  
Channels: 		 
{<110> 10 5.0 x 5.0** <-> ([001] 8 3.4 x 3.4* + <101> 8 2.8 x 4.0**) <-> <100> 8 3.3 x 3.4**}***
Dimensionality
  Sorption (molecular cross section > 3.4Å): 3-dimensional
  Topological (pore opening > 6-ring): 3-dimensional
 
Stability:		  
NH4 exchanged form not stable to heating
   
References:
  Cheetham, A.K., Fjellvåg, H., Gier, T.E., Kongshaug, K.O., Lillerud, K.P. and Stucky, G.D.
  "Very open microporous materials: from concept to reality"
Stud. Surf. Sci. Catal., 135, 158 (2001)
Material name:   OSB-2
Chemical formula:   [Be22Si54O152]-OBW
  § Lillerud, K.P.
private communication, , (2004)
 
  
Name and Code derivation:
    Universities of Oslo and Calif., Santa Barbara - two
  OSB-2 (two)
  OBW
 
 
§ Chemical Formula and Unit Cell taken from the reference marked with this sign
Limiting Rings
 
10-ring viewed along [110]

8-ring viewed along [001]

8-ring viewed along [101]

8-ring viewed along [100]

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