Walter Minder (August 6, 1905 – April 1, 1992) was a Swiss mineralogist and chemist.
[1] In 1931, he became professor of radiology at the Institut du Radium at the University of Bern.
[2] He together with Alice Leigh-Smith announced the discovery of element 85 (now called astatine)[3] in 1940[4] and 1942.
He was a pacifist and regretted that the atomic bomb had been dropped on Hiroshima on his 40th birthday.
In 1960 he participated in two pacifist demonstrations against the possibility of Switzerland purchasing nuclear weapons.