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Iron Isotopes

Stable Iron Isotopes - Fe Isotopes
Nominal
mass
Accurate
mass
% Natural
abundance
Chemical
form
Enrichment
available %

54 Fe 53.9396127 (15) 5.845 (35) metal, oxide, sulphate 26 - 99+

56 Fe 55.9349393 (16) 91.754 (36) metal, oxide, sulphate 97 - 99+

57 Fe 56.9353958 (16) 2.119 (10) sodium ferricyanide, metal, oxide 81 - 96+

58 Fe 57.9332773 (16) 0.282 (4)

metal, oxide, chloride

82 - 93+
 
Iron Isotopes are mainly used in nutritional studies, with Fe-57 and Fe-58 being the two most commonly used Fe isotopes. Studies have included iron-loss by human adolescents, conditions for effective iron absorption, interventions for anemia and genetic iron control. The Fe-54 isotope is used for the production of radioactive Fe-55 which in turn is used as an electron capture detector and in X-ray fluorescence. Fe-56 can be used for the production of radioactive Co-55 which is used as a tumor seeking agent in bleomycin.