The name praseodymium comes from a combination of two Greek words: prasios, meaning "green" and didymos, or "twin."
A mixture of praseodymium with neodymium is used to make specialty goggles for welders and glass blowers.
Naturally occurring praseodymium is composed of one stable isotope, 141Pr.
Praseodymium (chemical symbol Pr, atomic number 59) is a soft silvery metallic element that is a member of the lanthanide series of chemical elements.
The isotopes of praseodymium range in atomic weight from 120.955 atomic mass units (u) (121Pr) to 158.955 u (159Pr).
Praseodymium and its alloys and compounds are useful in a variety of ways.
Praseodymium is an inner transition metal (or lanthanide) that lies in period 6 of the periodic table, between cerium and neodymium.
Praseodymium and its alloys and compounds can be used for various purposes, as follows.
Praseodymium is available in small quantities in the Earth’s crust—about 9.5 parts per million (ppm).
Praseodymium also makes up about five percent of Mischmetal, an alloy of rare earth elements in a range of naturally occurring proportions.
Like all rare earths, praseodymium is of low-to-moderate toxicity.