Material Name:	Natrolite
	Chemical Formula:	|Na8 (H2O)8|2 [Al8Si12O40]2-NAT
	Unit Cell:§	orthorhombic	F d d 2 (# 43)
		a' = 18.3000 Å	b' = 18.6300 Å	c' = 6.6000 Å
		α' = 90.000°	β' = 90.000°	γ' = 90.000°
		(Relationship to unit cell of Framework Type: a' = b' = a · sqrt(2), c' = c or, as vectors, a' = a + b, b' = b - a, c' = c)
	Framework Density:	17.8 T/1000 Å3

Channels:

[001] 9 2.5 x 4.1* <-> <100> 8 2.6 x 3.9** Dimensionality   Sorption (molecular cross section > 3.4Å): 0-dimensional   Topological (pore opening > 6-ring): 3-dimensional

	References:
		Pauling, L.
			"The structure of some sodium and calcium aluminosilicates"
			Proc. Natl. Acad. Sci., 16, 453-459 (1930)
			Material name:   Natrolite
			Chemical formula:   [Al8Si12O40]2-NAT
	§	Meier, W.M.
			"The crystal structure of natrolite"
			Z. Kristallogr., 113, 430-444 (1960)

	Name and Code derivation:
		Nat rolite   NAT

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