Rao, Vandavasi Koteswara ; Kam, Kinson C. ; Cheetham, Anthony K. ; Natarajan, Srinivasan (2006) Inorganic-organic hybrid structures: synthesis, structure and magnetic properties of a new iron oxalatoarsenate,[NH3(CH2)CH(NH3)CH3]3[Fe6(AsO4)2(HAsO4)6(C2O4)3] Solid State Sciences, 8 (6). pp. 692-697. ISSN 1293-2558
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S12932...
Related URL: http://dx.doi.org/10.1016/j.solidstatesciences.2006.02.031
Abstract
A hydrothermal reaction of a mixture of iron oxalate, arsenic acid, 1,2-diaminopropane and water at 150°C gave rise to a new three-dimensional iron oxalatoarsenate, [NH3(CH2)CH(NH3)CH3]3[Fe6(AsO4)2(HAsO4)6(C2O4)3], I. Crystal data: hexagonal, space group = P-3c1, a=13.9899(12), c=14.936(3) Å, V=2531.6(5) Å3. The structure consists of layers of vertex-sharing FeO6 octahedral and AsO4 tetrahedral units that form 12-membered apertures. The layers are connected together by the oxalate units, forming a uniform one-dimensional channel that is occupied by protonated amine molecules. Variable temperature powder XRD studies indicates that I loses crystallinity at ~300°C forming an amorphous phase that gives way to crystalline FeAsO4 at ~650°C. Magnetic studies reveal that I is antiferromagnetic with TN=31 K.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Iron; Inorganic-organic Hybrid; Hydrothermal Synthesis; X-ray Diffraction |
| ID Code: | 27740 |
| Deposited On: | 11 Dec 2010 08:21 |
| Last Modified: | 04 Mar 2011 09:49 |
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