Database of Zeolite Structures

Framework Type MEI
  *ZSM-18, siliceous
    Lawton, S.L. and Rohrbaugh, W.J.
The framework topology of ZSM-18, a novel zeolite containing rings of three (Si,Al)-O species
Science, 247, 1319-1321 (1990)
  |Nax (H2O)28 | [AlxSi34-xO68]-MEI  (x=2.1-5.7)

  ZSM-18, dealuminated
    Schmitt, K.D., Kennedy, G.J.
Toward the rational design of zeolite synthesis: the synthesis of zeolite ZSM-18
Zeolites, 14, 635-642 (1994)
  [Si - O]-MEI
    Afeworki, M., Dorset, D.L., Kennedy, G.J and Strohmaier, K.G.
Synthesis and structure of ECR-40: an ordered SAPO having the MEI framework
Stud. Surf. Sci. Catal., 154, 1274-1281 (2004)
    Miller, M.A., Moscoso, G.J., Koster, S., Gatter, M.G. and Lewis, G.J.
Synthesis and characterization of the 12-ring zeolites UZM-4 (BPH) and UZM-22 (MEI) via the charge density mismatch approach in the Choline-Li<sub>2</sub>O-SrO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> system
Stud. Surf. Sci. Catal., 170A, 347-354 (2007)
  |(Cho+)3.7| [Al - Si - O]-MEI
Cho+ = C5H14NO+ = choline
= 2-hydroxyethyl(trimethyl)azanium  Images:  stick or 3D

XRD pattern:  UZM-22, as made
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  *  An asterisk (*) in front of the material name indicates that it is the Reference Material