Database of Zeolite Structures
 

Framework Type DAC
Reference Material
  Material Name: Dachiardite    
 
Chemical Formula:		  
|(Ca0.5,K,Na)5 (H2O)12 | [Al5Si19O48]-DAC		  
   
Unit Cell:§ 		 
monoclinic
 C 1 2/m 1 (# 12)
    a' = 18.6760 Å b' = 7.5180 Å c' = 10.2460 Å  
    α' = 90.000° β' = 107.870° γ' = 90.000°  
   
Framework Density: 		 
17.5 T/1000 Å3
 
  
Channels: 		 
[010] 10 3.4 x 5.3* <-> [001] 8 3.7 x 4.8*
Dimensionality
  Sorption (molecular cross section > 3.4Å): 2-dimensional
  Topological (pore opening > 6-ring): 2-dimensional
   
References:
  Gottardi, G. and Meier, W.M.
  "The crystal structure of dachiardite"
Z. Kristallogr., 119, 53-64 (1963)
Material name:   Dachiardite
Chemical formula:   [Al5Si19O48]-DAC
  § Vezzalini, G.
  "A refinement of Elba dachiardite: Opposite acentric domains simulating a centric structure"
Z. Kristallogr., 166, 63-71 (1984)
 
  
Name and Code derivation:
    Dachiardite
  DAC
 
 
§ Chemical Formula and Unit Cell taken from the reference marked with this sign
Limiting Rings
 
10-ring viewed along [010]

8-ring viewed along [001]


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