MFI: Type Material

Framework Type MFI

Reference Material

Material Name:	ZSM-5
Chemical Formula:	\|Na_x (H₂O)₁₆\| [Al_xSi_96-xO₁₉₂]-MFI (x<27)
Unit Cell:^§	orthorhombic	P n m a (# 62)
	a' = 20.0700 Å	b' = 19.9200 Å	c' = 13.4200 Å
	α' = 90.000°	β' = 90.000°	γ' = 90.000°
Framework Density:	17.9 T/1000 Å³

Channels:

{[100] 10 5.1 x 5.5 <-> [010] 10 5.3 x 5.6}***

Dimensionality
	Sorption (molecular cross section > 3.4Å):	3-dimensional
	Topological (pore opening > 6-ring):	3-dimensional

Note:

The straight channels along [010] are connected to one another via the sinusoidal channels along [100], so by navigating alternately along the [010] and [100] channels, a molecule can also diffuse in the [001] direction.

References:
	Kokotailo, G.T., Lawton, S.L., Olson, D.H. and Meier, W.M.
		"Structure of synthetic zeolite ZSM-5"
		Nature, 272, 437-438 (1978)
		Material name: ZSM-5
		Chemical formula: [Al_xSi_96-xO₁₉₂]-MFI (x<27)
^§	Olson, D.H., Kokotailo, G.T., Lawton, S.L. and Meier, W.M.
		"Crystal Structure and Structure-Related Properties of ZSM-5"
		J. Phys. Chem., 85, 2238-2243 (1981)
	van Koningsveld, H., van Bekkum, H. and Jansen, J.C.
		"On the location and disorder of the tetrapropylammonium (TPA) ion in zeolite ZSM-5 with improved framework accuracy"
		Acta Crystallogr., B43, 127-132 (1987)
		Material name: ZSM-5, as-made
		Chemical formula: [Al_xSi_96-xO₁₉₂]-MFI (x<27)

	Name and Code derivation:
		Zeolite Socony Mobil - five ZSM-5 (five) MFI



^§	Chemical Formula and Unit Cell taken from the reference marked with this sign

Limiting Rings

10-ring viewed along [100]	10-ring viewed along [010]