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A Hybrid Open-Framework Aluminum Phosphate-Oxalate Possessing Large Circular 12-Membered Channels

Kedarnath, K and Choudhury, Amitava and Natarajan, Srinivasan (2000) A Hybrid Open-Framework Aluminum Phosphate-Oxalate Possessing Large Circular 12-Membered Channels. In: Journal of Solid State Chemistry, 150 (2). pp. 324-329.

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A new aluminum phosphate-oxalate, I, $[N_2C_4H_{12}]Al_2(PO_4) (HPO_4)(C_2O_4)]H_2O$, has been synthesized hydrothermally in the presence of structure- irecting amines. The hybrid structure comprises a vertex- inkage of $AlO_6 $octahedra, $PO_4$tetrahedra, and $C_2O_4$units leading to three-dimensional connectivity. The connectivity between $AlO_6 $ and $PO_4$ units are such that it forms double-six rings that are connected to each other via the oxalate units, thereby leading to the formation of a large circular 12-membered channel of width $\sim 9 \AA$ along the c axis. The structure-directing amine along with one water molecule is situated within this channel. The connectivity also forms two different types of 8-membered channels along the a and b axes. The three- imensional structure of I, is very similar to the naturally occurring aluminosilicate zeolite, gmelinite. Crystal data for I are: monoclinic, space group Pccm, a = 9.992(1), b = 11.644(1), $c = 12.231(1) \AA$, V = 1423.0(2), M = 438.9, Z = 4, $R_F = 0.07$.

Item Type: Journal Article
Publication: Journal of Solid State Chemistry
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 26 Aug 2008
Last Modified: 19 Sep 2010 04:49
URI: http://eprints.iisc.ac.in/id/eprint/15676

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