Database of Zeolite Structures
 

Framework Type MEP
Type Material
  Material Name: Melanophlogite    
 
Chemical Formula:
 
|(CH4,N2,CO2)x| [Si46 O92]-MEP
 
   
Unit Cell:
 
cubic

 P m -3 n (# 223)
    a = 13.4360Å b = 13.4360Å c = 13.4360Å  
    α = 90.000 ° β = 90.000° γ = 90.000°  
(Data refer to structure at 200?; tetragonal at 25?C)
   
Framework density:
 
19.0 T/1000 Å3
 
 
Channels:
 
apertures formed by 6-rings only (0-dimensional)
   
References:
    Gies, H.
   "Studies on clathrasils. III. Crystal structure of melanophlogite, a natural clathrate compound of silica"
   Z. Kristallogr., 164, 247-257 (1983)
 
 
Name and Code derivation:
    Melanophlogite
  MEP