Neutron diffraction studies on ND4[Co1-xNixPO4]•D2O
NH4M(II)PO4•H2O have been studied,by several research groups, since they were first described in 1864 by Debray. These compounds have been used as pigments for protective paint finishes on metal and as fire retardants in paints and plastics,and they can be also applied as catalyst and fertilizers. Our research group has synthetized by hydrothermal synthesis and characterized by X-Ray diffraction and thermogravimetry measurements,a family of ammonium-cobalt nickel phosphates,NH4[Co1-xNixPO4]•H2O(x=0.00,0.34,0.55,0.59,0.71,1.00) which crystallize in the Pnma and Pnm21 space group depending on the ratio between Co(II) and Ni(II) ions in the structure. With X-Ray data we are not able to differentiate between cobalt and nickel atoms because of occupational disorder,therefore neutron measurements were done in D1B to obtain a full characterization of this family. During this experiment magnetic order were observed at low angle and temperature in some compounds of the family,but we need high resolution to study more in detail these magnetic order. In order to perform this experiment 2 days on the D2B powder diffractometer operating at low temperature conditions,will be necessary.
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TORRE-FERNANDEZ LAURA; FABELO ROSA Oscar Ramon; FERNANDEZ ALFONSO Belen; GARCIA Ruben; GARCIA GRANDA Santiago and TROBAJO FERNANDEZ Camino. (2013). Neutron diffraction studies on ND4[Co1-xNixPO4]•D2O. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-21-1078
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