Material Name:	VPI-7
	Chemical Formula:	|Na13H3 (H2O)22|2 [Zn8Si28O72]2-VSV
	Unit Cell:§	orthorhombic	F d d 2 (# 43)
		a' = 39.8800 Å	b' = 10.3260 Å	c' = 10.2190 Å
		α' = 90.000°	β' = 90.000°	γ' = 90.000°
		(Relationship to unit cell of Framework Type: a' = c, b' = a · sqrt(2), c' = b · sqrt(2) or, as vectors, a' = c , b' = b - a, c' = a + b)
	Framework Density:	17.1 T/1000 Å3

Channels:

[01-1] 9 3.3 x 4.3* <-> [011] 9 2.9 x 4.2*<-> [011] 8 2.1 x 2.7* Dimensionality   Sorption (molecular cross section > 3.4Å): 0-dimensional   Topological (pore opening > 6-ring): 3-dimensional

	References:
		Annen, M.J., Davis, M.E., Higgins, J.B. and Schlenker, J.L.
			"VPI-7 - The 1st Zincosilicate Molecular Sieve Containing 3-Membered T-Atom Rings"
			Chem. Commun., , 1175-1176 (1991)
			Material name:   VPI-7
			Chemical formula:   [Zn8Si28O72]2-VSV
	§	Röhrig, C., Gies, H. and Marler, B.
			"Rietveld refinement of the crystal structure of the synthetic porous zincosilicate VPI-7"
			Zeolites, 14, 498-503 (1994)

	Name and Code derivation:
		Virgina Polytechnic Institute - seven   VPI-7 (seven)   VSV

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