Isotopes of Iron (Fe)

Symbol Mass Number Relative Atomic Mass Isotopic Composition
45Fe 45 45.01458(24)#
46Fe 46 46.00081(38)#
47Fe 47 46.99289(28)#
48Fe 48 47.980500(80)#
49Fe 49 48.97361(16)#
50Fe 50 49.962990(60)
51Fe 51 50.956820(16)
52Fe 52 51.948114(7)
53Fe 53 52.9453079(19)
54Fe 54 53.9396105(7) 0.05845(35)
55Fe 55 54.9382934(7)
56Fe 56 55.9349375(7) 0.91754(36)
57Fe 57 56.9353940(7) 0.02119(10)
58Fe 58 57.9332756(8) 0.00282(4)
59Fe 59 58.9348755(8)
60Fe 60 59.934072(4)
61Fe 61 60.936745(21)
62Fe 62 61.936767(16)
63Fe 63 62.94037(18)
64Fe 64 63.94120(30)
65Fe 65 64.94538(26)
66Fe 66 65.94678(32)
67Fe 67 66.95095(45)
68Fe 68 67.95370(75)
69Fe 69 68.95878(54)#
70Fe 70 69.96146(64)#
71Fe 71 70.96672(86)#
72Fe 72 71.96962(86)#

Legend

Mass Number
Relative Atomic Mass
Isotopic Composition
Standard Atomic Weight
Fe: 55.845(2)

Isotopic Composition