{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:25:31Z","timestamp":1760149531492,"version":"build-2065373602"},"reference-count":43,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,8,14]],"date-time":"2023-08-14T00:00:00Z","timestamp":1691971200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FEDER funds through the COMPETE 2020 Program and National Funds through FCT\u2014Portuguese Foundation for Science and Technology","award":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"],"award-info":[{"award-number":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"]}]},{"name":"Associate Laboratory Institute of Nanostructures","award":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"],"award-info":[{"award-number":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"]}]},{"name":"Nanomodelling, and Nanofabrication\u2014i3N., UCIBIO","award":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"],"award-info":[{"award-number":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"]}]},{"name":"Associate Laboratory i4HB","award":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"],"award-info":[{"award-number":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"]}]},{"name":"FCT\u2014Portuguese Foundation for Science and Technology","award":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"],"award-info":[{"award-number":["LISBOA-01-0247-FEDER-039985","POCI-01-0247-FEDER-039985","LA\/P\/0037\/2020","UIDP\/50025\/2020","UIDB\/50025\/2020","UIDP\/04378\/2020","UIDB\/04378\/2020","LA\/P\/0140\/2020","SFRH\/BD\/148233\/2019"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Crystals"],"abstract":"<jats:p>Na1.5MnII3MnIII0.5(AsO4)3 and Na1.5MnII3FeIII0.5(AsO4)3 compounds were synthesized via a high-temperature solid-state combustion reaction. The obtained samples were submitted to structural, morphological, and electrical characterizations. X-ray diffraction measurements revealed that both compounds crystallize in the monoclinic system with the space group P21\/c. The lattice parameters were determined to be a = 6.78344 \u00c5, b = 12.93830 \u00c5, c = 11.22825 \u00c5, and \u03b2 = 98.5374\u00b0 for Na1.5MnII3MnIII0.5(AsO4)3, and a = 6.76723 \u00c5, b = 12.9864 \u00c5, c = 11.256 \u00c5, and \u03b2 = 98.8636\u00b0 for Na1.5Mn2+3Fe3+0.5(AsO4)3. The structures consist of octahedral MnII and MnIII or FeIII ions connected by sharing edges, forming infinite chains. These chains are further connected by AsO4 tetrahedra, resulting in a three-dimensional anionic framework with tunnels parallel to the a-direction and cavities according to the c-direction. The structural models were validated using bond valence and charge distribution analyses. In addition to the structural characterization, the electric results depended on the crystal structures, indicating the potential of the studied materials for being used in several applications.<\/jats:p>","DOI":"10.3390\/cryst13081251","type":"journal-article","created":{"date-parts":[[2023,8,14]],"date-time":"2023-08-14T10:13:57Z","timestamp":1692008037000},"page":"1251","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Crystal Structure, Ionic Conductivity, Dielectric Properties and Electrical Conduction Mechanism of the Wyllieites Na1.5Mn3.5(AsO4)3 and Na1.5Mn3Fe0.5(AsO4)3"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-7018-6212","authenticated-orcid":false,"given":"Eya","family":"Rezgui","sequence":"first","affiliation":[{"name":"Laboratory of Materials, Crystallochemistry and Applied Thermodynamics, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis 1068, Tunisia"}]},{"given":"Najoua","family":"Ouerfelli","sequence":"additional","affiliation":[{"name":"Laboratory of Materials, Crystallochemistry and Applied Thermodynamics, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis 1068, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6216-3735","authenticated-orcid":false,"given":"S. R.","family":"Gavinho","sequence":"additional","affiliation":[{"name":"i3N & Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2416-9081","authenticated-orcid":false,"given":"J. P. F.","family":"Carvalho","sequence":"additional","affiliation":[{"name":"i3N & Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6858-9507","authenticated-orcid":false,"given":"M. P. F.","family":"Gra\u00e7a","sequence":"additional","affiliation":[{"name":"i3N & Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4084-5764","authenticated-orcid":false,"given":"S. Soreto","family":"Teixeira","sequence":"additional","affiliation":[{"name":"i3N & Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,8,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.jcat.2007.06.026","article-title":"Selective Oxidation of N-Butane over Nanosized Crystallites of (VO)2P2O7 Synthesized by an Exfoliation-Reduction Process of VOPO4\u00b72H2O in a Mixture of 2-Butanol and Ethanol","volume":"251","author":"Imai","year":"2007","journal-title":"J. Catal."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1016\/S0925-3467(03)00122-8","article-title":"Luminescence and Scintillation Properties of Praseodymium Poly and Diphosphates","volume":"24","author":"Jouini","year":"2003","journal-title":"Opt. Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1038\/nmat1063","article-title":"Nano-Network Electronic Conduction in Iron and Nickel Olivine Phosphates","volume":"3","author":"Herle","year":"2004","journal-title":"Nat. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"541","DOI":"10.1016\/S1293-2558(02)01289-X","article-title":"Structural and Electrical Study of the Alluaudites (Ag1 \u2212 xNax)2FeMn2(PO4)3 (x = 0, 0.5 and 1)","volume":"4","author":"Daidouh","year":"2002","journal-title":"Solid State Sci."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"122644","DOI":"10.1016\/j.jssc.2021.122644","article-title":"Synthesis, Crystal Structure and Na+ Transport in Na3La(AsO4)2","volume":"305","author":"Bdey","year":"2022","journal-title":"J. Solid State Chem."},{"key":"ref_6","unstructured":"Masquelier, C., Patoux, S., Wurm, C., and Morcrette, M. (2009). Lithium Batteries, Springer."},{"key":"ref_7","first-page":"131","article-title":"Wyllieite, Na2Fe2+ 2Al[PO4]3, a New Species","volume":"4","author":"Moore","year":"1973","journal-title":"Mineral. Rec."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1180\/minmag.1979.043.326.04","article-title":"Alluaudites, Wyllieites, Arrojadites: Crystal Chemistry and Nomenclature","volume":"43","author":"Moore","year":"1979","journal-title":"Miner. Mag."},{"key":"ref_9","first-page":"209","article-title":"Fupingqiuite, IMA 2016-087. CNMNC Newsletter No. 35","volume":"81","author":"Yang","year":"2017","journal-title":"Miner. Mag."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"i40","DOI":"10.1107\/S1600536812018843","article-title":"Wyllieite-Type Ag1.09Mn3.46(AsO4)3","volume":"68","author":"Frigui","year":"2012","journal-title":"Acta Crystallogr. Sect. E Struct. Rep. Online"},{"key":"ref_11","first-page":"295","article-title":"Synthesis and Physico-Chemical Study of Na0.5K0.65Mn3.43(AsO4)3 Compound","volume":"6","author":"Frigui","year":"2011","journal-title":"Jordan J. Chem."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"126313","DOI":"10.1088\/2053-1591\/ab59f9","article-title":"Synthesis, Structure and Na+ Migration Pathways of New Wylleite-Type Na1.25Co2.187Al1.125(AsO4)3","volume":"6","author":"Marzouki","year":"2019","journal-title":"Mater. Res. Express"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1016\/j.jssc.2019.01.034","article-title":"Na3Bi(AsO4)2: Synthesis, Crystal Structure and Ionic Conductivity","volume":"272","author":"Bdey","year":"2019","journal-title":"J. Solid State Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"S13","DOI":"10.1017\/S0885715614000840","article-title":"The High Score Suite","volume":"29","author":"Degen","year":"2014","journal-title":"Powder Diffr."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1107\/S2052520618015718","article-title":"SoftBV\u2014A Software Tool for Screening the Materials Genome of Inorganic Fast Ion Conductors","volume":"75","author":"Chen","year":"2019","journal-title":"Acta Crystallogr. Sect. B Struct. Sci."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1272","DOI":"10.1107\/S0021889811038970","article-title":"VESTA 3 for Three-Dimensional Visualization of Crystal, Volumetric and Morphology Data","volume":"44","author":"Momma","year":"2011","journal-title":"J. Appl. Crystallogr."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Teixeira, S.S., Gra\u00e7a, M.P.F., Lucas, J., Valente, M.A., Soares, P.I.P., Lan\u00e7a, M.C., Vieira, T., Silva, J.C., Borges, J.P., and Jinga, L.I. (2021). Nanostructured LiFe5O8 by a Biogenic Method for Applications from Electronics to Medicine. Nanomaterials, 11.","DOI":"10.3390\/nano11010193"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1016\/j.physb.2007.03.009","article-title":"Electric and Dielectric Properties of a SiO2-Na2O-Nb2O5 Glass Subject to a Controlled Heat-Treatment Process","volume":"396","author":"Sombra","year":"2007","journal-title":"Phys. B Condens. Matter"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1007\/s10971-012-2829-0","article-title":"Structural and Dielectric Characterization of LiNbO3 Nano-Size Powders Obtained by Pechini Method","volume":"64","author":"Prezas","year":"2012","journal-title":"J. Solgel. Sci. Technol."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"570","DOI":"10.1016\/j.solidstatesciences.2008.07.010","article-title":"NaNbO3 Crystals Dispersed in a B2O3 Glass Matrix\u2014Structural Characteristics versus Electrical and Dielectrical Properties","volume":"11","author":"Valente","year":"2009","journal-title":"Solid State Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"210","DOI":"10.1107\/S0021889801002242","article-title":"EXPGUI, a Graphical User Interface for GSAS","volume":"34","author":"Toby","year":"2001","journal-title":"J. Appl. Crystallogr."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1154\/1.2179804","article-title":"R Factors in Rietveld Analysis: How Good Is Good Enough?","volume":"21","author":"Toby","year":"2006","journal-title":"Powder Diffr."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"278","DOI":"10.1107\/S0108768101003068","article-title":"Structural Science Relationship between Bond Valence and Bond Softness of Alkali Halides and Chalcogenides","volume":"B57","author":"Adams","year":"2001","journal-title":"Acta Crystallogr. Sect. B Struct. Sci."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1107\/S0567739473000689","article-title":"Empirical Bond-strength\u2013Bond-length Curves for Oxides","volume":"29","author":"Brown","year":"1973","journal-title":"Acta Crystallogr. Sect. A"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"741","DOI":"10.1127\/0935-1221\/2005\/0017-0741","article-title":"The Crystal Structure of a New Synthetic Member in the Wyllieite Group: Na1.265Mn2+2.690Mn3+0.785(PO4)3","volume":"17","author":"Yakubovich","year":"2005","journal-title":"Eur. J. Mineral."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"i98","DOI":"10.1107\/S010827010200882X","article-title":"Na1.72Mn3.28(AsO4)3","volume":"58","author":"Ayed","year":"2002","journal-title":"Acta Crystallogra. Sect C Cryst. Struct. Commun."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"925","DOI":"10.1107\/S0567740869003220","article-title":"Effective Ionic Radii in Oxides and Fluorides","volume":"25","author":"Shannon","year":"1969","journal-title":"Acta Crystallogr. Sect. B Struct. Sci."},{"key":"ref_28","first-page":"402","article-title":"Crystal Structure of a New Tripotassium Hexanickel Iron Hexaphosphate","volume":"75","author":"Ouaatta","year":"2019","journal-title":"Acta Crystallogr. Sect. E Struct. Rep. Online"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Nakamoto, K. (2009). Infrared and Raman Spectra of Inorganic and Coordination Compounds Part B: Applications in Coordination, Organometallic, and Bioinorganic Chemistry, Wiley. [6th ed.].","DOI":"10.1002\/9780470405840"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"66","DOI":"10.1016\/0022-4596(92)90201-6","article-title":"Crystal Data and Spectroscopic Studies of NaNiFe2(AsO4)3","volume":"101","author":"Augsburger","year":"1992","journal-title":"J. Solid State Chem."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"566","DOI":"10.1002\/jrs.2454","article-title":"Raman Microscopy of the Mixite Mineral BiCu6(AsO4)3(OH)6\u00b73H2O from the Czech Republic","volume":"41","author":"Frost","year":"2009","journal-title":"J. Raman Spectrosc."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1006\/jssc.1995.1343","article-title":"Structure of the Complex Arsenates NaCa2M2+2(AsO4)3 (M2+ = Mg, Ni, Co): First Experimental Evidence of a Garnet-Alluaudite Reversible Polymorphism","volume":"118","author":"Khorari","year":"1995","journal-title":"J. Solid State Chem."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1006\/jssc.1997.7526","article-title":"Alluaudite-Like Structure of the Arsenate Na3In2(AsO4)3","volume":"134","author":"Khorari","year":"1997","journal-title":"J. Solid State Chem."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1225","DOI":"10.1016\/j.elecom.2011.08.038","article-title":"Synthesis and Electrode Performance of Carbon Coated Na2FePO4F for Rechargeable Na Batteries","volume":"13","author":"Kawabe","year":"2011","journal-title":"Electrochem. Commun."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1244","DOI":"10.1080\/10426507.2012.745077","article-title":"Synthesis, Crystal Structure, and Characterization of Na7Cu4(AsO4)5","volume":"188","author":"Rajah","year":"2013","journal-title":"Phosphorus Sulfur Silicon Relat. Elem."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/j.jssc.2019.06.005","article-title":"Synthesis, Structural, Magnetic and Thermal Properties of Mn2As2O5, the First Pyro-Arsenite of a First-Row Transition Metal","volume":"277","author":"Priestner","year":"2019","journal-title":"J. Solid State Chem."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1016\/j.jallcom.2006.07.028","article-title":"Impedance Spectroscopy Study of NaBa2V5O15 Ceramic","volume":"436","author":"Behera","year":"2007","journal-title":"J. Alloys Compd."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"034107","DOI":"10.1063\/1.3615935","article-title":"Impedance and Modulus Studies of Magnetic Ceramic Oxide Ba2Co2Fe12O22(Co2Y) Doped with Bi2O3","volume":"110","author":"Costa","year":"2011","journal-title":"J. Appl. Phys."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"055702","DOI":"10.1088\/0031-8949\/82\/05\/055702","article-title":"Studies of the Structural and Electrical Properties of Lithium Ferrite (LiFe5O8)","volume":"82","author":"Sohn","year":"2010","journal-title":"Phys. Scr."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"150","DOI":"10.1016\/j.matchemphys.2005.09.086","article-title":"Characterization of Electrical Properties of Pb-Modified BaSnO3 Using Impedance Spectroscopy","volume":"99","author":"Kumar","year":"2006","journal-title":"Mater. Chem. Phys."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1016\/j.jallcom.2006.11.081","article-title":"Impedance Spectroscopy of (Na0.5Bi0.5)(Zr0.25Ti0.75)O3 Lead-Free Ceramic","volume":"453","author":"Lily","year":"2008","journal-title":"J. Alloys Compd."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/S0924-4247(99)00291-5","article-title":"Structural and Electrical Properties of Ba(Sn,Sb)O3 Electroceramics Materials","volume":"80","author":"Lu","year":"2000","journal-title":"Sens. Actuators A"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"370","DOI":"10.1007\/s11664-021-09301-z","article-title":"Physical Properties, Complex Impedance, and Electrical Conductivity of Double Perovskite LaBa0.5Ag0.5FeMnO6","volume":"51","author":"Rammeh","year":"2022","journal-title":"J. Electron. Mater."}],"container-title":["Crystals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4352\/13\/8\/1251\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T20:32:56Z","timestamp":1760128376000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4352\/13\/8\/1251"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,8,14]]},"references-count":43,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2023,8]]}},"alternative-id":["cryst13081251"],"URL":"https:\/\/doi.org\/10.3390\/cryst13081251","relation":{},"ISSN":["2073-4352"],"issn-type":[{"type":"electronic","value":"2073-4352"}],"subject":[],"published":{"date-parts":[[2023,8,14]]}}}