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Phosphates de protactinium pentavalent
Affiliation:1. Fondation Curie, Institut du Radium, Laboratoire d''Arcueil 4, Avenue de la Convention 94110-Arcueil, France;2. Institut National de Recherche Chimique appliquée, B.P. No. 1, 91710 Vert-le-Petit, France;1. Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland;2. Department of Anthropology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland;3. Biobank Lab, Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pilarskiego 14/16, 90-237 Lodz, Poland;1. Department of Applied Physics, Chandigarh University, Gharuan, Mohali, Punjab, India;2. Indo-US Science & Technology Forum, Fulbright House, 12, Hailey Road, New Delhi, India;3. Department of Physics, University of the Free State, Bloemfontein, South Africa;4. Institute of Forensic Science & Criminology, Panjab University, Chandigarh, India;1. Department of Chemistry, Chung-Ang University, Seoul, 06974, Republic of Korea;2. Department of Chemistry, Sogang University, Seoul, 04107, Republic of Korea;3. Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
Abstract:Protactinium orthophosphate PaO(H2PO4)3·2H2O (phase I) crystallises from 10−1 M Pa(V) solutions in 14 M H3PO4. Phase I is stable up to 250°C. On further heating the following transformations occur:
></figure> <figure class=></figure> <figure class=></figure> <figure class=></figure><figure class=></figure> <figure class=></figure>. The existence of a “homologous serie” of phosphorus and protactinium oxides can be invoked to explain the structural analogies between the phosphates (VI) and (VII).Interplanar distances and intensities, lattice parameters, and the experimental and calculated densities are given for some phosphates.</td>
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