Question: "What is the boiling point of radium?"

A search using AltaVista on +"boiling point" +radium yielded the following:

http://204.234.22.1/SDGI/Westridge/elements/Radium.html

from there to http://wild-turkey.mit.edu/Chemicool/elements/radium.html

Resulting in: melting point=973.2 K ,   boiling point 1973 K

http://tqd.advanced.org/10676/Period/ra.html

Information valid for Ra-266:  Melting Point: 700, Boiling Point: 1737, (units unknown).

http://phycmt2.sogang.ac.kr/~smshin/physics/curri-sub/periodic/ra.html

Melting Point (°C): 700, Boiling Point (°C): 1140

http://www2.shef.ac.uk/chemistry/web-elements/nofr-heat/Ra.html

Melting point 973 K, Boiling point 2010 K

http://wulff.mit.edu/pt/Ra.html

973 Melting Point, K

1413 Boiling Point, K

http://setec-astronomy.mit.edu/chemicool/radium.html

melting point 973.2 K

boiling point 1973 K

http://chemlab.pc.maricopa.edu/periodic/Ra.html

Melting point K 973

Boiling point K 1809

http://www.lv.psu.edu/rxg1/pertable/radium.html

Melting Point (° C): 700.05

Boiling Point (° C): 1699.85