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Vanadium was originally discovered in Mexico (originally called "erythronium"). The vanadium ore (plomo pardo de Zimipán - brownish-gray lead of Zimipán; modern name is vanadinite) was taken from the Purísima del Cardonal Mine in the state of Hidalgo, near Zimipán. Today no vanadinite can be found here, but is common at other localities in Mexico.
The chemical analysis leading to the discovery of the new element was by del Río at the mining school in Mexico City (Ciudad de México).
Today the trip from Mexico City to the Zimipán is accomplished on route 85, which is the Federal Highway ultimately connecting Mexico City with Nuevo Laredo on the Texas border. This highway is the original Inter-American Highway.
Lomo de Toro was historically the largest mine complex in the Zimapán area whose headquarters in Zimapán can be visited.