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Andrés Manuel del Río
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<p>Andrés Manuel del Río y Fernández (10 November 1764 – 23 March 1849) was a Spanish <a href="/facts/Scientist/JDvthEFM">scientist</a>, <a href="/facts/Natural_history/pSlAvbTX">naturalist</a> and <a href="/facts/Engineer/ph4TnHnG">engineer</a> who discovered compounds of <i><a href="/facts/Vanadium/UvKkKTSm">vanadium</a></i> in 1801. He proposed that the element be given the name <i>panchromium</i>, or later, <i>erythronium</i>, but his discovery was not credited at the time, and his names were not used. </p>