Database of Zeolite Structures
 

Framework Type -CHI
Reference Material
  Material Name: Chiavennite    
 
Chemical Formula:		  
|Ca4 Mn4 (H2O)8 | [Be8Si20O52(OH)8]--CHI		  
   
Unit Cell: 		 
orthorhombic
 P n a b (# 60)
    a' = 8.7290 Å b' = 31.3260 Å c' = 4.9030 Å  
    α' = 90.000° β' = 90.000° γ' = 90.000°  
(Relationship to unit cell of Framework Type: a' = -c, b' = b, c' = a)
   
Framework Density: 		 
20.9 T/1000 Å3
 
  
Channels: 		 
[001] 9 3.9 x 4.3*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 1-dimensional
  Topological (pore opening > 6-ring): 1-dimensional
   
References:
  Tazzoli, V., Domeneghetti, M.C., Mazzi, F. and Cannillo, E.
  "The crystal structure of chiavennite"
Eur. J. Mineral., 7, 1339-1344 (1995)
 
  
Name and Code derivation:
    Chiavennite
  -CHI
Limiting Rings
 
9-ring viewed along [001]


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