Crystal structures of CrH2P3O10 and InH2P3O10 |
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Authors: | K A Selevich L S Ivashkevich A F Selevich |
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Institution: | (1) Research Institute of Physicochemical Problems, Belarussian State University, Minsk, Belarus |
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Abstract: | The crystal structures of chromium and indium dihydrogen triphosphates, CrH2P3O10 and InH2P3O10, in modification II are refined by the Rietveld method using X-ray powder diffraction data. The compounds crystallize in the monoclinic crystal system, space group P21/n. Z = 4, a = 7.3225(4)Å, b = 8.6835(6)Å, c = 11.6599(7) Å, and b = 102.388(3)° for CrH2P3O10, and a = 7.5332(1)Å, b = 9.0841(1)Å, c = 11.8600(1) Å, and b = 103.9596(7)° for InH2P3O10. The structures are refined in the isotropic approximation (pseudo-Voigt profile function): Rp = 4.8%, Rwp = 6.9%, RBragg = 7.5%, RF = 9.9% for CrH2P3O10; Rp = 6.3%, Rwp = 8.3%, RBragg = 6.2%, RF = 4.1% for InH2P3O10. The crystal structures of compounds in the isostructural series MIIIH2P3O10-II, where MIII = Al, Ga, Cr, V, Fe, and In, are examined and compared. |
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