Material Name:	AlPO-21
	Chemical Formula:	|H8 (DMA)21.32 (Pro)10.66 (OH)8|1/2 [Al24P24O96]1/2-AWO DMA = C2H7N = dimethylamine = N-methylmethanamine SMILES: CNC   Images:  stick or 3D Pro = C3H8 = propane SMILES: CCC   Images:  3D
	Unit Cell:	monoclinic	P 1 21/a 1 (# 14)
		a' = 10.3300 Å	b' = 17.5240 Å	c' = 8.6760 Å
		α' = 90.000°	β' = 123.370°	γ' = 90.000°
		(Relationship to unit cell of Framework Type: a' = a, b '= c , c '= b/ (2sin(β')) or, as vectors, a' = a, b' = c, c' = (b - a)/2 AlPO4-21 transforms to AlPO4-25 (ATV) upon dehydration.)
	Framework Density:	18.3 T/1000 Å3

	Channels:	[100] 8 2.7 x 4.0* Dimensionality   Sorption (molecular cross section > 3.4Å): 0-dimensional   Topological (pore opening > 6-ring): 2-dimensional
	Stability:	Transforms to AlPO-25 upon calcination

	References:
		Bennett, J.M., Cohen, J.M., Artioli, G., Pluth, J.J. and Smith, J.V.
			"Crystal Structure of AlPO4-21, a Framework Aluminophosphate Containing Tetrahedral Phosphorus and both Tetrahedral and Trigonal-Bipyramidal Aluminum in 3-, 4-, 5-, and 8-rings"
			Inorg. Chem., 24, 188-193 (1985)
		Parise, J.B. and Day, C.S.
			"The structure of trialuminium tris(orthophosphate) hydrate, AlPO4-21, with clathrated ethylenediamine, Al3(PO4)3*C2H8N2*H2O, and pyrrolidine, Al3(PO4)3*C4H9N*H2O"
			Acta Crystallogr., C41, 515-520 (1985)
			Material name:   AlPO-21
			Chemical formula:   [Al24P24O96]1/2-AWO

	Name and Code derivation:
		AlPO4-21 (twenty-one)   AWO