Table 1.

Summary of the properties measured in the IEA powder characterization program

Category	Properties
Physical properties	Density, specific surface area, particle size distribution
Major elements	Carbon, nitrogen, silicon, zirconium
Nonmetallic impurities	Chlorine, fluorine, oxygen, sulfur
Metallic impurities	Aluminum, barium, boron, calcium, free carbon, total carbon, chromium, gallium, iron, magnesium, manganese, nickel, potassium, free silicon, sodium, tin, titanium, tungsten
Other impurities	Hafnium, holmium, neodymium, yttrium