Mössbauer,electrokinetic and refined lattice parameters study of synthetic manganoan lipscombite |
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| Authors: | R Vochten P van Acker E De Grave |
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| Institution: | 1. Laboratory for Chemical and Physical Mineralogy, University of Antwerpen, Middelheimlaan 1, 2020, Antwerpen, Belgium
2. Laboratory for Magnetism, State University of Gent, Proeftuinstraat 42, 9000, Gent, Belgium
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| Abstract: | Manganoan lipscombite (Fe x /2+ , M y /2+ ) Fe 3?(x +y)/3+ OH)3?(x+y)(PO4)2] was synthesized from pure chemicals. From the study of the Mn2+/Fe2+ atomic ratio by Mössbauer spectra, solubility, and electrokinetic properties, it was found that the crystal structure of lipscombite is not changed substantially by the manganese substitution. The unit cell parameters were determined from Guinier-Hägg X-ray diffraction patterns, which are identical for both synthetic ferrous-ferric and manganoan lipscombite. The two compounds crystallize in the tetragonal system with a=5.3020±0.0005 Å and c=12.8800±0.0005 Å. |
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