Material Name:	AlPO-31
	Chemical Formula:	[Al18P18O72]-ATO
	Unit Cell:	trigonal	R -3 (# 148)
		a' = 20.8270 Å	b' = 20.8270 Å	c' = 5.0030 Å
		α' = 90.000°	β' = 90.000°	γ' = 120.000°
	Framework Density:	19.2 T/1000 Å3

Channels:

[001] 12 5.4 x 5.4* Dimensionality   Sorption (molecular cross section > 3.4Å): 1-dimensional   Topological (pore opening > 6-ring): 1-dimensional

	References:
		Bennett, J.M. and Kirchner, R.M.
			"The Structure of Calcined AlPO4-31 - A New Framework Topology Containing One-Dimensional 12-Ring Pores"
			Zeolites, 12, 338-342 (1992)
		Baur, W.H., Joswig, W., Kassner, D. and Kornatowski, J.
			"Structure of SAPO-31 Refined from Single-Crystal Diffraction Data: Substitution of P by Si Established by Diffraction Methods"
			Acta Crystallogr., B50, 290-294 (1994)
			Material name:   AlPO-31
			Chemical formula:   [Al18P18O72]-ATO

	Name and Code derivation:
		AlPO4-31 (thirty-one)   ATO