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Francium's melting point was estimated to be around 8.0 °C (46.4 °F); [11] a value of 27 °C (81 °F) is also often encountered. [8] The melting point is uncertain because of the element's extreme rarity and radioactivity ; a different extrapolation based on Dmitri Mendeleev 's method gave 20 ± 1.5 °C (68.0 ± 2.7 °F).
87 Fr francium; use: 890 K: ... Boiling points of the elements (data page) Some values are predictions ... Melting points of the elements (data page) ...
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
Francium, 87 Fr; Francium ... Color Phase Melting point Boiling point Sublimation point Density [g/L at s.t.p.] Density [kg/m3 at s.t.p.] Density [g/cm3 near ...
The melting point of a substance is the point where it changes state from solid to liquid while the boiling point of a substance (in liquid state) is the point where the vapour pressure of the liquid equals the environmental pressure surrounding the liquid [102] [103] and all the liquid changes state to gas.
As for francium: the closest I have been able to get is this paper, which quotes some estimations from its citres [6] and [7] (with a value of 871 K for the boiling point of Fr that seems more in keeping with the periodic law than the 950 K we currently quote), but I can't find those original sources for them to see if the values therein are ...
The boiling point of a substance is the temperature at which the ... and a compound's normal boiling point and melting point can serve as ... Fr 950 K (677 °C) ...
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid: