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・ Alfred Richard Orage
・ Alfred Richard Outtrim
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・ Alfred Ridley-Martin
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Alfred Rittmann
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・ Alfred Robinson (footballer, born 1888)
・ Alfred Robinson (footballer, born 1916)
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Alfred Rittmann : ウィキペディア英語版
Alfred Rittmann

Alfred Rittmann was a world's leading volcanologist at his time. He was elected IAV President (IAV at that time) for three periods (1954–1963).
==Life==
Rittmann was son of a dentist in Basel. He studied music and natural science at the University of Basel and later he changed to the University of Geneva. He received his PhD there (1922) for work on ultramafic rocks of the Ural.
Rittmann left Geneva to study with Antoine Lacroix in Paris, Friedrich Johann Karl Becke in Vienna, Ernst Anton Wülfing and Victor Mordechai Goldschmidt in Heidelberg. In 1926 the rich banker Immanuel Friedländer founded the Institute for Volcanology in Naples and Rittmann became leading scientist of the institute. His work focused on the Mount Vesuvius and on the island of Ischia. This resulted in his first great work: "Evolution und Differentiation des Somma-Vesuvmagmas" (Rittmann, 1933).
He drew the right conclusion that orogenic uplift volcanism (igneous rocks of the calc series), lacks alkaline basalts (igneous rocks of the sodic series). At the annual meeting of the German Geological Society in January 1939, he was right opposing the idea that the Mid-Atlantic Ridge was an orogenic uplift by compression, and his opposition to disregard the Continental drift theory raised doubts. The work "Über den Zustand des Erdinnern und seine Entstehung aus einem homogenen Urzustand" (Kuhn and Rittmann, 1941) defended the non existence of an iron-nickel Earth core. His work "Orogénèse et volcanisme" (Rittmann, 1951) with collaboration of W. Kuhn demonstrated that crystalline mantle is able to creep under its pressure and temperature. His book "Vulkane und ihre Tätigkeit" was translated in five languages (2 ed.) and it was a standard work on volcanism.
His daughter Loredana Rittmann is too a volcanologist. He received the Gustav-Steinmann-Medaille (1965) and the doctor honoris causa from the University of Bern (1959). The mineral rittmannite (IMA 1987-048, 08.DH.15) was named in his honour.

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