2010-j.solid state chem-Ca4Fe3&ampamp;amp;#8722;xMnxO8&ampamp;amp;#8722;δCl2.pdf

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1、ARTICLEINPRESSJournalofSolidStateChemistry183(2010)1215–1220ContentslistsavailableatScienceDirectJournalofSolidStateChemistryjournalhomepage:www.elsevier.com/locate/jsscCa4Fe3xMnxO8dCl2:Anewn?3Ruddlesden–PopperoxychlorideabcdeTaoYang,JunliangSun,MarkCr

2、oft,IsraelNowik,AlexanderIgnatov,fa,RihongCong,MarthaGreenblattaDepartmentofChemistryandChemicalBiology,Rutgers,TheStateUniversityofNewJersey,610TaylorRoad,Piscataway,NJ08854-8087,USAbStructuralChemistry,StockholmUniversity,SE-10691Stockholm,SwedencDepa

3、rtmentofPhysicsandAstronomy,Rutgers,TheStateUniversityofNewJersey,136FrelinghuysenRoad,Piscataway,NJ08854,USAdRacahInstituteofPhysics,TheHebrewUniversity,Jerusalem91904,IsraeleMaterialsScienceandEngineeringDepartment,RutgersUniversity,Piscataway,NJ08854,

4、USAfCollegeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871,PRChinaarticleinfoabstractArticlehistory:SolidstatesolutionsofCa4Fe3xMnxO8dCl2(0.92rxr1.79(d0.1)singlecrystalsweresynthesizedReceived5February2010inCaCl2-?uxinair.Thestructur

5、e,determinedbysingle-crystalX-raydiffraction,isrelatedtothen?3ReceivedinrevisedformRuddlesden–PopperphaseinspacegroupI4/mmmwithstrongdeviationsfromtheidealstructure.Mn10March2010andFearedisorderedovertwotransitionmetalsites.Duetothepositionaldisorderingo

6、ftheequatorialAccepted11March2010Availableonline18March2010oxygenatomsintheMO6octahedrainCa4Fe3xMnxO8dCl2bothtilting(91)alongthec-axisand57rotation(10.51)withintheab-planeareobserved.AlltheFeionsaretrivalent,ascon?rmedbyFeKeywords:Mossbauerspectrosco

7、pyandX-rayabsorptionnearedgespectroscopy(XAS),whiletheformalvalence¨Ruddlesden–PopperstateofMnvariesfromverycloseto4+inthex?0.92tomix-valent3+/4+inthex?1.79member,asOxychlorideindicatedbyXAS.Magneticinvestigationsevidenceshort-rangeantiferromagneticorder

8、ingalreadyIronatroomtemperatureandspin-glassbehavioratlowtemperatureduetothestructuraldisorderingManganeseofMn/Fe.Structure&2010ElsevierInc.Allrightsreserved.1.IntroductionMn,areextensivelystudied[9–12].Anotableexamplewast