SpinStatesandGriffithsphaseofPolycrystallineLa0.67Ca0.33CoO3,ZHANGHongguang,LIUHao,PerovskitepolycrystallineLa0.67Ca0.33CoO3particleswerepreparedwithsol-gelmethod.Thestructuresofthesampleswereexaminedbysynchrotronradiationhigher-resolutionX-ra