1-dimensional stacking disorder
Periodic Building Unit
Periodic Building Unit (PerBU):
EMM-17_layer
Layer symmetry
P 1 2/m (1)
2D cell parameters
a = 23.37 Å b = 12.60 Ågamma = 90°
References
Weston, S.C., Peterson, B.K., Gatt, J.E., Lonergan, W.W., Vroman, H.B., Afeworki, M., Kennedy, G.J., Dorset, D.L., Mervyn D. Shannon, M.D. and Strohmaier, K.G. "EMM-17, a new three dimensional zeolite with unique 11-ring channels and superior catalytic isomerization performance" J. Amer. Chem. Soc. , 141 , 15910-15920 (2019)
Examples
The layers are stacked along the [001] direction using the following connectivity patterns
2
1/2a + 1/3b
Show this stacking
2
1/2a - 1/3b
Show this stacking
* relative to the previous layer of connectors
Polymorph EMM-17_A
Cell Parameters:
orthorhombis
P 21 21 2: (# 18)
a = 24.7691 Åb = 23.3663 Åc = 12.6009 Å
α = 90.0000°
β = 90.0000°
γ = 90.0000°
Volume = 7292.9 Å3
Framework Density (FDSi ):
16.4
Ring sizes (# T-atoms):
11 10 6 5 4
Channel dimensionality:
Topological (pore opening > 6-ring): 3-dimensional
Maximum diameter of a sphere:
that can be included
6.63 Å
that can diffuse along
a: 4.6 Å
b: 5.48 Å
c: 5.22 Å
addional volume data
Composite Building Units:
In this space group and setting, the PerBUs are stacked along [100].
Note: This polymorph has NOT been observed as a pure ordered material
Polymorph EMM-17_B
Cell Parameters:
monoclinic
P 1 21 /c 1: (# 14)
a = 12.5600 Åb = 23.3914 Åc = 26.1944 Å
α = 90.0000°
β = 108.9300°
γ = 90.0000°
Volume = 7279.4 Å3
Framework Density (FDSi ):
16.5
Ring sizes (# T-atoms):
11 10 6 5 4
Channel dimensionality:
Topological (pore opening > 6-ring): 3-dimensional
Maximum diameter of a sphere:
that can be included
6.6 Å
that can diffuse along
a: 5.2 Å
b: 5.54 Å
c: 4.65 Å
addional volume data
Composite Building Units:
In this space group and setting, the PerBUs are stacked along [001].
Note: This polymorph has NOT been observed as a pure ordered material
