项目：                           高纯4N级
纯度                             ≥99.99%
稀土总杂质 RE impurities，ppm：
  La₂O₃                          1ppm
  CeO₂                           1ppm
  Pr₆O₁₁                         1ppm
  Nd₂O₃                          1ppm
  Sm₂O₃                          1ppm
  Eu₂O₃                          1ppm
  Tb₄O₇                          5ppm
  Gd₂O₃                          5ppm
  Dy₂O₃                          10ppm
  Ho₂O₃                          10ppm
  Tm₂O₃                          10ppm                  
  Yb₂O₃                          10ppm              
  Lu₂O₃                          10ppm
  Y₂O₃                           10ppm
稀土总量    TREO                  ＞99%
非稀土杂质Non-impurities，ppm：
Fe₂O₃                             ≤3
SiO₂                              ≤20
CaO                               ≤20
Cl-                               ≤250
灼烧减量 Loss on ignition         ≤0.25%

99.9% metals basis,nanopowder, <100 nm particle size (BET):


外观Appearance                          light orange to light red powder
X-Ray Diffraction                       Conforms to Structure
纯度Purity                              ≥99.9% Based On Rare Earth Analysis
痕量金属分析Trace Rare Earth Analysis   ≤1000ppm by ICP Atomic emission
粒径particle size                       <100 nm (BET)
粒径particle size                       < 50 nm (XRD)  

99.9% metals basis:


外观Appearance                          Faint Beige to Orange Powde
X-Ray Diffraction                       Conforms to Structure
纯度Purity                              ≥99.9% Based On Rare Earth Analysis
ICP:                                    Confirms Holmium Component Confirmed
Ho(Complexometric EDTA)                 86.0% - 88.6%  
痕量金属分析Trace Rare Earth Analysis   ≤2000ppm by ICP Atomic emission