What is Niobium?
Niobium (symbol Nb) is element 41 on the periodic table, a transition metal in period 5, group 5. A superconducting metal that carries the current in every MRI magnet on Earth. At room temperature it is a solid.
The story
What niobium is, and how we found it
A superconducting metal that carries the current in every MRI magnet on Earth.
The discovery of niobium
The Tale of Two Names
Niobium's discovery story is one of scientific rivalry, international politics, and stubborn nomenclature debates that lasted over 100 years. The element was actually discovered twice by the same person, and its name remained controversial well into the 20th century.
Charles Hatchett: The First Discovery (1801)
In 1801, British chemist Charles Hatchett was examining a mineral specimen in the British Museum collection. The dark, dense mineral had been sent from Massachusetts in 1734 and sat unstudied for 67 years. Hatchett noticed the mineral contained an unknown oxide with properties unlike any known element.
Working in his private laboratory, Hatchett dissolved the mineral in acid and precipitated a white oxide. He named the new element "columbium" after Columbia, a poetic name for America, honoring the mineral's origin. For his discovery, the Royal Society awarded Hatchett the prestigious Copley Medal in 1801.
Heinrich Rose and the Confusion (1844)
Forty-three years later, German chemist Heinrich Rose made a startling discovery while studying tantalite minerals. He found that what scientists thought was pure tantalum actually contained a second, very similar element. Rose realized this was the same element Hatchett had discovered decades earlier.
The Naming Controversy
Rose chose to rename the element "niobium" after Niobe, daughter of Tantalus in Greek mythology – a fitting choice since the element was so closely associated with tantalum (named after Tantalus). This created a bitter international naming dispute:
- American scientists insisted on "columbium," honoring Hatchett's priority
- European scientists preferred "niobium," following Rose's mythological naming convention
- The dispute lasted 100 years, with different countries using different names in textbooks and scientific papers
Resolution and Recognition
The naming controversy wasn't resolved until 1949, when the International Union of Pure and Applied Chemistry (IUPAC) officially adopted "niobium" as the standard name. However, American metallurgists continued using "columbium" for commercial purposes until the 1960s.
Jean Charles Galissard de Marignac's Contribution
Swiss chemist Marignac made crucial contributions in 1866 by successfully separating niobium and tantalum, proving they were indeed distinct elements. His meticulous work involved repeated fractional crystallization of their complex fluoride salts – a process requiring extraordinary patience and skill.
Pure Metal Isolation
The first pure niobium metal wasn't produced until 1925, when German chemist Werner von Bolton used an electric arc furnace to reduce niobium oxide. The resulting metal was only 99% pure, but it finally allowed scientists to study niobium's true properties after 124 years of working with compounds.