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PRODUCT DATA of Erbium
MaterialErbium
Chemical Composition100Er
CAS Registry ID7440-52-0
EXPERIENCE IN PRACTICE
Development StatusSpecial Commercial Product
Cost RangeHigh
Equivalent DesignationsEr
Space ExperienceLimited
PHYSICAL PROPERTIES
Atomic Number68
Atomic Weight167 amu
Specific Gravity9.07
ELASTIC PROPERTIES
Tensile Modulus70 GPa
Shear Modulus28 GPa
Bulk Modulus44 GPa
Poisson Ratio0.24
Speed of Sound (longitudinal)2830 m/s
ELECTRICAL PROPERTIES
Electrical Volume Resistivity8.6e-7 ohm.m
THERMAL PROPERTIES
Thermal Conductivity15 W/m.K
Thermal Expansion Coefficient12.2 μstrain/°C
Melting Range1800 °C
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
EMF vs SCE-1.34 V
Remark: Measured in 3.5% NaCl solution
Data Quality: Design Data
SPECIAL RECOMMENDATIONS
Lessons LearnedDuring plasma welding high intensities of UV are emitted that can cause sun burns very quickly.