Josef Zemann (25 May 1923 – 16 October 2022) was an Austrian mineralogist and geologist.
He studied mineralogy at the University of Vienna where he received his PhD for work with Felix Machatschki in 1946.
Zemann worked with Martin J. Buerger at the Massachusetts Institute of Technology in 1951 and 1952.
From 1967 until his retirement in 1989 he was head of the Institute of Mineralogy and Crystallography of the University of Vienna.
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