Martite

Fe2O3. Pseudomorphous mineral, with the chemical composition of hematite and the crystalline form of magnetite or pyrite. Martius, KARL FREIDRICH PHILIPP VON, 1794-1868. German botanist, in Brazil 1817-20; Prof. Munich 1826-64. Flora cryptogamic a Erlang ens is , 1817; Hist or i a natural is Palmarum , 1831-50; Herbarium Flore Bras i liens is , 1837; Flora Brasili ens is, 1840-70; Botanica pharmaceutico - medic a , 1852.