41. Upon short irradiation, this mixture is dominated by curium-246, and then curium -248 begins to accumulate. 42. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide.43. When introduced into the human body, curium accumulates in the bones, lungs and liver, where it promotes cancer. 44. The table to the right lists the critical masses for curium isotopes for a sphere, without a moderator and reflector. 45. Obtaining Curium -244 : For many of the reactions described above, curium metal is provided by an outside retailer. 46. Obtaining Curium-244 : For many of the reactions described above, curium metal is provided by an outside retailer. 47. It is primarily composed of unconverted uranium as well as significant quantities of transuranic actinides ( plutonium and curium , mostly ). 48. During his Manhattan Project research in 1943, Glenn T . Seaborg experienced unexpected difficulties in isolating the elements americium and curium . 49. Reduction by Hydrogen Gas : A solution of curium trichloride is evaporated to dryness with pure nitric acid to produce curium nitrate. 50. Reduction by Hydrogen Gas : A solution of curium trichloride is evaporated to dryness with pure nitric acid to produce curium nitrate.
