Nils Gabriel Sefström (2 June 1787 – 30 November 1845) was a Swedish chemist.

Sefström was a student of Berzelius and, when studying the brittleness of steel in 1830, he rediscovered a new chemical element, to which he gave the name vanadium.

[1] Vanadium was first discovered by the Spanish-Mexican mineralogist Andrés Manuel del Río in 1801.

[3]: 684 The Spitzbergen glacier Sefströmbreen,[4] and the mountain ridge of Sefströmkammen, are named after him.

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