Basic Information

Name: Ytterbium 
Symbol: Yb 
Atomic Number: 70 
Atomic Mass: 173.04 amu 
Melting Point: 824.0 °C (1097.15 K, 1515.2 °F) 
Boiling Point: 1466.0 °C (1739.15 K, 2670.8 °F) 
Number of Protons/Electrons: 70 
Number of Neutrons: 103 
Classification: Rare Earth 
Crystal Structure: Cubic 
Density @ 293 K: 6.98 g/cm3 
Color: Silvery
Date of Discovery: 1878 
Discoverer: Jean de Marignac 
Name Origin: Ytterby (a town in Sweden) 
Uses: metallurgical and chemical experiments 
Obtained From: yttria, monazite, gadolinite, xenotime