氧化铥
Cas号 12036-44-1
分子式 Tm2O3 
分子量 385.88
别名 三氧化二铥
质量标准  
  项目：                           高纯4N级
纯度purity                       ≥99.99%
稀土总杂质 RE impurities，ppm：
  La2O3                          1ppm
  CeO2                           1ppm
  Pr6O11                         1ppm
  Nd2O3                          1ppm
  Sm2O3                          1ppm
  Eu2O3                          1ppm
  Gd2O3                          1ppm
  Tb4O7                          1ppm
  Dy2O3                          1ppm
  Ho2O3                          10ppm                          
  Er2O3                          10ppm                         
  Yb2O3                          25ppm              
  Lu2O3                          5ppm
  Y2O3                           5ppm
稀土总量    TREO                  ＞99%
非稀土杂质Non-impurities，ppm：
Fe2O3                             ≤3
SiO2                              ≤20
CaO                               ≤65
Cl-                               ≤200
灼烧减量 Loss on ignition         ＜0.50%

指标                         5N级
稀土纯度REO/TREO             99.999%
稀土总量∑REO%               99.5
稀土总杂质                   0.001 
非稀土杂质                   0.001% 
灼减                         0.5 %  
 
性状 白色略带微绿色粉末，不溶于水，溶于酸。
用途 用于荧光材料激光剂，电子工业及科学研究。