"1791Z"^^ . . "Johann Friedrich August Breithaupt (May 16, 1791 \u2013 September 22, 1873) was a German mineralogist and professor at Freiberg Mining Academy in Freiberg, Saxony."@en . "German mineralogist" . "1873-09-22Z"^^ . "Breithaupt, August"@en . "1791-05-16Z"^^ . . . "1873Z"^^ .