we are the manufacture factory 1,high purity:99%--99.999% 2,wide range of uses 3,quality and quantity stable 4,competitive price 5,delivery on time Grade99.999%99.99%99.9%99%Pr6O11/TREO (% min.)99.99999.9999.999TREO (% min.)99999999Loss On Ignition (% max.)1111Rare Earth Impurities% max.% max.% max.% max.La2O3/TREOCeO2/TREONd2O3/TREOSm2O3/TREOEu2O3/TREOGd2O3/TREOY2O3/TREO0.00050.00050.0010.00010. ...