AI Article Synopsis
- A new polymorph of Li(2)FeSiO(4) was created by heating it at 900 degrees Celsius and quickly cooling it, and its structure has been analyzed using various microscopy and diffraction techniques.
- The crystal structure is similar to Li(2)CdSiO(4) and is classified under the space group Pmnb, with specific lattice parameters.
- Key differences were noted between this polymorph and another one obtained at 700 degrees Celsius; specifically, the orientation and arrangement of FeO(4) and SiO(4) tetrahedra varies between the two forms.
Article Abstract
We report on the crystal structure of a new polymorph of Li(2)FeSiO(4) (prepared by annealing under argon at 900 degrees C and quenching to 25 degrees C) characterized by electron microscopy and powder X-ray and neutron diffraction. The crystal structure of Li(2)FeSiO(4) quenched from 900 degrees C is isostructural with Li(2)CdSiO(4), described in the space group Pmnb with lattice parameters a = 6.2836(1) A, b = 10.6572(1) A, and c = 5.0386(1) A. A close comparison is made with the structure of Li(2)FeSiO(4) quenched from 700 degrees C, published recently by Nishimura et al. (J. Am. Chem. Soc. 2008, 130, 13212). The two polymorphs differ mainly on the respective orientations and alternate sequences of corner-sharing FeO(4) and SiO(4) tetrahedra.
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| http://dx.doi.org/10.1021/ic100741x | DOI Listing |
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