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Isotopes with half life more than 3 minutes are listed Fr, more than 10 minutes for all other cases.

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N.J. Stone, Table of recommended nuclear magnetic dipole moments: Part I, long-lived states, INDC(NDS)-079 Available online

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Juris Meija et al., Isotopic compositions of the elements 2013 (IUPAC Technical Report), Pure Appl. Chem. 88, 293 (2016), DOI

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I. Angeli, K.P. Marinova,Table of experimental nuclear ground state charge radii: An update, Atomic Data and Nuclear Data Tables 99, 69 (2013), DOI, Weblink

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N.J. Stone, Table of nuclear electric quadrupole moments, At. Data Nucl. Data Tables 111-112, 1 (2016), DOI

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Isotope info

Half-life info

Natural abundance (%) info
Nuclear spin

Rms radii (fm) info

Magnetic moment (μN) info Quadrupole moment (b) info
210Fr 210 Fr 3.2 minutes 6 5.5818(176) 5.5818 0.0176 4.38(5) 4.38 0.05 0.19(2) 0.19 0.02
211Fr 211 Fr 3.1 minutes 9/2 5.5882(176) 5.5882 0.0176 3.97(5) 3.97 0.05 -0.19(3) -0.19 0.03
212Fr 212 Fr 20 minutes 5 5.5915(176) 5.5915 0.0176 4.59(5) 4.59 0.05 -0.10(1) -0.1 0.01
221Fr 221 Fr 4.9 minutes 5/2 5.6790(177) 5.679 0.0177 1.57(2) 1.57 0.02 -0.98(6) -0.98 0.06
222Fr 222 Fr 14.2 minutes 2 5.6890(177) 5.689 0.0177 0.63(1) 0.63 0.01 0.51(4) 0.51 0.04
223Fr 223 Fr 22 minutes 3/2 5.6951(178) 5.6951 0.0178 1.16(1) 1.16 0.01 1.17(1) 1.17 0.01
224Fr 224 Fr 3.3 minutes 1 5.7061(178) 5.7061 0.0178 0.40(1) 0.4 0.01 0.517(4) 0.517 0.004
225Fr 225 Fr 3.95 minutes 3/2 5.7112(178) 5.7112 0.0178 1.06(1) 1.06 0.01 1.32(5) 1.32 0.05
Isotope State    Theory    Experiment
210Fr 7s1/2 7195.1(4) E112
7p1/2 946.3(2) E112
7p3/2 78.2(2) E114
8s1/2 1577.8(11) E113
9s1/2 622.25(36) E111
7d3/2 22.3(5) E115
7d5/2 -17.8(8) E115