Material Name:	PST-21
	Chemical Formula:	|H1.8(H2O)6.9 | [Al1.8Si18.2O40]-PWO
	Unit Cell:	monoclinic	P 1 21/c 1 (# 14)
		a' = 9.1017 Å	b' = 11.7322 Å	c' = 10.9595 Å
		α' = 90.000°	β' = 93.228°	γ' = 90.000°
	Framework Density:	17.1 T/1000 Å3

	Channels:	[001] 9 4.2 x 4.4* <-> [011] 9 4.2 x 4.4* Dimensionality   Sorption (molecular cross section > 3.4Å): 2-dimensional   Topological (pore opening > 6-ring): 2-dimensional
		Note:
		The 9-ring shown on the right is the limiting ring in both channel directions

	References:
		Jo, D., Park, G.T., Shin, J. and Hong, S.B.
			"A zeolite family nonjointly built from the 1,3-stellated cubic building unit"
			Angew. Chem. Int. Ed., 57, 2199-2203 (2018)

	Name and Code derivation:
		POSTECH, Pohang (Korea) - twenty-one   PST-21 (twenty-one   PWO