Database of Zeolite Structures
 

Framework Type APD
Reference Material
  Material Name: AlPO-D    
 
Chemical Formula:
 
[Al16P16O64]-APD
 
   
Unit Cell:
 
orthorhombic

 P c a 21 (# )
    a' = 19.1870Å b' = 8.5760Å c' = 9.8040Å  
    α' = 90.000 ° β' = 90.000° γ' = 90.000°  
(Relationship to unit cell of Framework Type: a' = b, b' = a, c' = c)
   
Framework Density:
 
19.8 T/1000 Å3
 
 
Channels:
 
[010] 8 2.3 x 6.0* <-> [201] 8 1.3 x 5.8*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 0-dimensional
  Topological (pore opening > 6-ring): 2-dimensional
   
References:
  Keller, E.B., Meier, W.M. and Kirchner, R.M.
  "Synthesis, structures of AlPO4-C and AlPO4-D, and their topotactic transformation"
Solid State Ionics, 43, 93-102 (1990)
 
 
Name and Code derivation:
    AlPO4-D
  APD
Limiting Rings
 
distorted 8-ring viewed along [010]

distorted 8-ring along [201]