5.PricesoflanthanumandceriumproductsdecreasedgraduallyafterreachingthehighPricesoflanthanumandceriumproductsroserapidlywithholisticpricesoaringinrareearthmarketduring2011.However,affectedbythesluggishdemandfrominternationalcrudeoil,petroleumcrackingcatalysts,glass,specialmaterialsandbatteryindustries,thepricedroppedgraduallyafterithitthehighestlevel.Thehighestpriceoflanthanum