Rio, Andres Manuel del

Discovered (1801) by the Mexican chemist Andres Manuel del Rio and re-discovered (1830) by the Swedish chemist Nils G. Sefstrom. 

Earlier, in 1801 in Mexico, Andres Manuel del Rio, a chemist and mineralogist, discovered an unusual substance he called erythronium, but he was told it was similar to chromium. Only later was it found to be vanadium. Some early references credit Del Rio with vanadiums discovery, but the most recent references list Sefstrom as the discoverer. 

Don Andres Manuel del Rio, 1764—1849. Professor of mineralogy, French, and Spanish at the School of Mines of Mexico. Member of the American Philosophical Society. He discovered the element vanadiuiii (erythro-nium), but later confused it with chromium. This portrait belongs to the school of mines of Mexico. 

Since a royal order, transmitted through the Viceroy of Mexico, had decreed that Werner s theory of the formation of veins be taught to the students, the brilliant young Don Andres Manuel del Rfo was sent to Mexico to introduce the most approved mining methods which he had learned at Freiberg (13). Although del Rio had declined the professorship of chemistry, he accepted that of mineralogy, and took with him on the warship San Pedro Alcantara a quantity of equipment for the School of Mines. Soon after his arrival in Mexico City in December, 1794,... 

In 1801, the year in which Hatchett discovered niobium, Andres Manuel del Rio, a professor of mineralogy in Mexico, examined a specimen of brown lead ore from Zimapan and concluded that it contained a metal similar to chromium and uranium. Little has been written concerning the personal life of del Rio. He was born in Madrid on November... 

Andres Manuel del Rio, 1764-1849. Spanish-Mexican scientist. For half a century he was professor of mineralogy at the School of Mines of Mexico. 

Dedication Page of The Mineral Wealth of Mexico and Its Present State of Development, which S. Ramirez wrote for the New Orleans Exposition of 1884. Translation To the memory of the distinguished scientist, expert mine operator, and celebrated mineralogist, D. Andres Manuel del Rio, whose well deserved fame designated him to be the introducer of the natural sciences into our country, whose stainless love for Mexico makes him figure among our most illustrious fellow citizens, and from whose scientific books our generations of mine operators have imbibed instruction, this unimportant work is dedicated as a tribute by the most respectful of his admirers. ... 

Vanadium was discovered in 1801 by Spanish-Mexican metallurgist Andres Manuel del Rio (1764—1849). The element was re-discovered nearly 30 years later by Swedish chemist Nils Gabriel Sefstrhm (1787—1845). 

Spanish-Mexican metallurgist Andres Manuel del Rio discovers vanadium. 

The element was named by Nils Gabriel Sefstrom (1787-1845) after the Scandinavian goddess of beauty Vanadis. In 1801, Andres Manuel del Rio (1764-1849) identified a new metal he called erythronium (from the Greek for red) that seemed related to uranium and chromium, but he was advised that it was actually lead chromate. In 1830, Sefstrom rediscovered the element and named it, finding out a year later that it was the same material as described by del Rio. Vanadium compounds are found in trace amounts in nature. The majority of vanadium is used as an alloy in steel production. 

Andres Manuel del Rio y Fernandez actually discovered vanadium when experimenting with theplomo pardo de Zimapan from the Cordonal Mine in Hidalgo. Fascinated by the... 

Andres Manuel del Rio (11) (1795) later took charge of the Mineralogy courses. In the year 1801 this scientist discovered a new metal while examining some minerals of "dark lead", from the mine "La Purisima", located in Zimapan, now known as the state of Hidalgo, Mexico. He first named the metal PANDROMO, due to the range of colors of its oxides, solutions, salts and precipitates. He later named it ERITRONIO, because the salts turned red with heat or with acids. 

Vanadium 1801/1830 Andres Manuel del Rio (Mexico) Nils Gabriel Sefstrom (Sweden) ... 

Alexander von Humboldt had studied at the Bergakademie Freiberg in Germany together with Andre Manuel del Rio (see Chapter 21 Vanadium), with whom he had continued con-... 

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