Database of Zeolite Structures
 

Framework Type AHT
Reference Material
  Material Name: AlPO-H2    
 
Chemical Formula:
 
|(H2O)16|1/2 [Al12P12O48]1/2-AHT
 
   
Unit Cell:§
 
monoclinic

 P 1 1 21 (# 63)
    a' = 9.4860 Å b' = 9.9140 Å c' = 8.1260 Å  
    α' = 90.000° β' = 90.000° γ' = 121.490°  
(Relationship to unit cell of Framework Type: a'= a/(2 sin(γ')), b'=b, c'=c
or, as vectors, a' = (a - b)/2, b' = b, c' = c)
   
Framework Density:
 
18.4 T/1000 Å3
 
 
Channels:
 
[001] 10 3.3 x 6.8*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 0-dimensional
  Topological (pore opening > 6-ring): 1-dimensional
 
Stability:
 
Transforms to AlPO4-tridymite on heating
   
References:
  Li, H.X., Davis, M.E., Higgins, J.B. and Dessau, R.M.
  "Aluminophosphate Molecular Sieves Comprised of Hydrated Triple Crankshaft Chains"
Chem. Commun., , 403-405 (1993)
Material name:   AlPO-H2
Chemical formula:   [Al12P12O48]1/2-AHT
  § Higgins, J.B.
private communication, ,
  Kennedy, G.J., Higgins, J.B., Ridenour, C.F., Li, H.X. and Davis, M.E.
  "Multifield magic-angle spinning and double-rotation nuclear magnetic resonance studies of a hydrated aluminophosphate molecular sieve: AlPO4-H2"
Solid State Nucl. Mag. Res., 4, 173-178 (1995)
Material name:   AlPO-H2
Chemical formula:   [Al12P12O48]1/2-AHT
 
 
Name and Code derivation:
    AlPO4-H2 (two)
  AHT
 
 
§ Chemical Formula and Unit Cell taken from the reference marked with this sign
Limiting Rings
 
10-ring viewed along [001]