Database of Zeolite Structures
 

Framework Type HEI
Materials
 
  *HPM-18, ordered, calcined
    Yu, H., Zhang, Z., Li, J., Balestra, S.R.G., Rei Gao, Z. and Camblor, M. A.
Unexpected Phase Selectivity in Germanosilicate Zeolite Synthesis: Discovery and Structure of HPM-18, a Novel Stable d4r- Containing Structure
Journal of Materials Chemistry A, , (2026)
  [Si40Ge8O96]-HEI  [1]

 
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  * The Reference Material is indicated with an asterisk (*).
  1 Fluoride acts as a second structure-directing agent