No, it is radium's natural state below 700 C. Actually I still don't know enough of the question to even look for an answer. I only responded since the questioner named my employer as the perpetrator of 50 year old research. I'll continue to try to find out what this is all about and then summarize. Dale E. Boyce dale@radpro.uchicago.edu My employer would never do 50 year old research.