Also used to decolorize glass, FTP, name this element with atomic number 25 and symbol Mn.
Clifford Schull's neutron diffraction experiments on this element's oxide lead to the discovery of antiferromagnetism, and it is commonly extracted from pyrolusite.  One form of radiometric dating charts the ratio of one isotope of this element to an isotope of chromium.  One atom of it is coordinated to the active site of mitochondrial superoxide dismutase, and it is also present in diphtheria toxin and the oxygen-evolving complex of photosystem II.  Its dioxide is capable of selectively creating carbonyls from benzylic alcohols, and a compound containing this metal is useful in redox titrations.  Also used to decolorize glass, FTP, name this element with atomic number 25 and symbol Mn.
Clifford Schull's neutron diffraction experiments on this element's oxide lead to the discovery of antiferromagnetism, and it is commonly extracted from pyrolusite.  
{Manganese} or {Mn} before mention