// MATTER · ELEMENT 59 / 118atoms.no/elements
Pr59
Praseodymium
Pr·Z 59·Lanthanide·140.9·⭕ 3A · B♭ Minor
▸ The reading
interpretive · artPraseodymium is Greek for 'green twin' — Welsbach split the supposed element didymium in 1885 and found two, naming this one for its green-tinged salts. It tints welding goggles against glare and toughens magnesium for aircraft engines. Half of a broken pair that turned out whole on its own.
The science below is cited as science; the symbolic layers are flagged as interactive art.
⚜ Periodic Frequency
3AB♭ Minor
a seat struck in brass — testimony, not prediction
the seat has its own room on ⭕ THE OVAL TABLE — tap the code
▸ The lenses
▸ Discovery
Carl Auer von Welsbach — split 'didymium' into Pr and Nd by fractional crystallization · Austria · 1885
▸ Stellar origin
s-process in AGB starsSlow neutron capture in dying low-mass stars builds praseodymium; ⁹⁹.⁵+ percent of natural Pr is the single isotope ¹⁴¹Pr.
▸ Reactivity
Forms green compounds (Pr₂O₃ pale yellow-green)Greek 'prasinos didymos' meaning 'green twin' — half of the didymium pair, named for its color.
▸ Applications
- Yellow-tinted welding goggles
- Magnesium aircraft engine alloys
- Permanent magnets (Pr-Fe-B)
- Yellow-green pigments and glass
▸ Curiosity
Greek for 'green twin' — Welsbach split the supposed element didymium into a green-tinged Pr and a neighbor he called neodymium.
▸ Related readings
a resonance drawn between readings — not a claim that they share an origin.