EMM-17: DO Family

Intergrowth Family EMM-17

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 Å	gamma = 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)

Connectivity pattern

Examples

The layers are stacked along the [001] direction using the following connectivity patterns

Symmetry Operation^*	Translation^*	Comment	Image
2	1/2a + 1/3b
2	1/2a - 1/3b

^* relative to the previous layer of connectors

Simplest ordered end members


Polymorph EMM-17_A

Cell Parameters:	orthorhombis	P 2₁ 2₁ 2: (# 18)
	a = 24.7691 Å	b = 23.3663 Å	c = 12.6009 Å
	α = 90.0000°	β = 90.0000°	γ = 90.0000°
	Volume =	7292.9 Å³
Framework Density (FD_Si):	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:


mel	mor	bea	stf	mtw

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 Å	b = 23.3914 Å	c = 26.1944 Å
	α = 90.0000°	β = 108.9300°	γ = 90.0000°
	Volume =	7279.4 Å³
Framework Density (FD_Si):	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:


mel	mor	bea	stf	mtw

In this space group and setting, the PerBUs are stacked along [001].
Adjacent layers generated by the same connectivity pattern (same basic color) are shown with different shades for clarity.

	Note: This polymorph has NOT been observed as a pure ordered material