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Fr - Francium (87/223.02)
Material List
Currently compound materials are not available.
Naturally occurring isotopes:
None (actinium decay product)
Density:
g/cm
3
Melting point:
27 (est)
o
C
Boiling point:
677 (est)
o
C
Latent heat of fusion:
9.39
J/g
Specific heat:
J/g/K (at room temp.)
Coefficient of lineal thermal expansion:
cm/cm/K (at room temp.)
Thermal conductivity:
W/cm/K (at room temp.)
Electrical resistivity:
hm-cm (at room temp.)
lonization potential (1st):
3.83
eV
Electronic work function Φ:
Oxidation potentials:
V
Chemical valence:
1
Electrochemical equivalents:
8.3209
g/amp-hr
lonic radius:
1.8 (Fr+)
angstrom
Valence electron potential:
8
-eV
Principal quantum number:
7
Principal electron shells:
K L M N O P Q
Electronic configuration:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s1
Valence electrons:
7s1
Crystal form:
BCC
Half life:
22 minutes
Cross section σ:
barns
Vapor pressure:
Pa (at melting point)
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