The blue allotropic form of Co2+:Na2CoP2O7: optical and magnetic properties,correlation with crystallographic data |
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| Institution: | 2. ICMM-CSIC, Campus de Cantoblanco, Madrid 28049, Spain;1. Department of Chemistry, Syracuse University, Syracuse, NY 13244, United States;2. France European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France;3. University Grenoble Alpes-Centre National de la Recherche Scientifique-EMBL Unit of Virus Host-Cell Interactions, 71 Avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France;4. Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610-1477, United States;1. College of Chemistry and Chemical Engineering & College of Physical Science and Technology, Xinjiang University, 666 Shengli Road, Urumqi, 830046, China;2. Department of Physics, Tamkang University, New Taipei City, 25137, Taiwan;1. University of Pardubice, Faculty of Chemical Technology, Department of Inorganic Technology, Doubravice 41, 532 10, Pardubice, Czech Republic;2. University of Pardubice, Faculty of Chemical Technology, Center of Materials and Nanotechnologies, Čs. Legions Sq. 565, 532 10, Pardubice, Czech Republic;3. West Pomeranian University of Technology, Szczecin, Faculty of Chemical Technology and Engineering, Department of Inorganic and Analytical Chemistry, Al. Piastów 42, 71-065, Szczecin, Poland |
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| Abstract: | Na2CoP2O7 is found in two allotropic forms. The first one is rose and belongs to the triclinic crystallographic system. The second one is blue and described in the orthorhombic system, space group Pna21, No. 33, with cell parameters a=15.378(6) Å, b=10.271(4) Å, c=7.713(2) Å and Z=8. A recent work showed that the orthorhombic phase could be considered as tetragonal: space group P42/mnm, No. 136 with a=7.706(1) Å and b=10.301(2) Å and Z=4. The optical and magnetic properties, particularly the EPR spectrum, of the divalent cobalt ion and their phenomenological simulation were of considerable help to complement the study and allowed us to specify the real structure. |
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