Periodic Table · element

Praseodymium

Pr · Z 59

atomic number

59

atomic mass

140.91

notation

Pr

group

f-block: Lanthanide

period

6

state0c

Solid

state20c

Solid

density

6.77

melting pt

931

boiling pt

3520

discovered

1885

abundance

9.2

ore grade

3000

ore minerals

with neodymium in bastnäsite and monazite

mined as

By-product

extraction

Co-product of the same rare-earth ores as neodymium, and often left mixed with it as didymium for magnets.

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From the All Periodical Elements database in Notion, last edited 2026-08-16. This page is the row, rendered by the build; nothing on it is written by hand.