Database of Zeolite Structures
 

Framework Type DAC
Type Material
  Material Name: Dachiardite    
 
Chemical Formula:
 
|(Ca2+0.5,K+,Na+)5 (H2O)12| [Al5Si19 O48]-DAC
 
   
Unit Cell:
 
monoclinic

 C 1 2/m 1 (# 12)
    a = 18.6760Å b = 7.5180Å c = 10.2460Å  
    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* (2-dimensional)
   
References:
    Vezzalini, G.
   "A refinement of Elba dachiardite: Opposite acentric domains simulating a centric structure"
   Z. Kristallogr., 166, 63-71 (1984)
Gottardi, G. and Meier, W.M.
   "The crystal structure of dachiardite"
   Z. Kristallogr., 119, 53-64 (1963)
 
 
Name and Code derivation:
    Dachiardite
  DAC
Limiting Rings
 
10-ring viewed along [010]

8-ring viewed along [001]