Ir Iridium 77 192.217 9 6 d 77 2410.0 4130.0 [Xe] 4f14 5d7 6s2 2 8 18 32 15 2 22.4 4E-8% Silver Cubic: Face centered 2.2 1.68 {"1":"880","2":"1600"} 880 151 +4,3,6 1.36 8.54 26.36 563.58 0.13 147.0 0 Solid, Paramagnetic, Conductor, TransitionMetal, Metal, Stable, Natural i-RID-i-em Heavy, brittle, white metal. Used with osmium to tip gold pen points, to make crucible and special containers. Also to make alloys used for standard weights and measures, and heat-resistant alloys. Also as hardening agent for platinum. Found in gravel deposits with platinum. 0OOJ7qBwVHU Iridium

In 1853, Jean Charles Galissard de Marignac discovered samarium when he found lines in mineral spectra.

Paul Émile Lecoq de Boisbaudran isolated a samarium salt in Paris in 1879 from the mineral samarskite and identified a new element in it via sharp optical absorption lines.

The pure element was produced only in 1901 by Eugène-Anatole Demarçay. From samarskite, a mineral named after Russian mine official, Col. Samarski 77 1803 Smithson Tennant, Antoine Fourcroy, Louis Vanquelin, Hippolyte Collet-Descotils England, France From the Greek word "iris" meaning "rainbow"

Samarium is considered to be moderately toxic

Samarium metal can be produced by reducing the oxide with lanthanum

Samarium's main use is in samarium-cobalt alloy magnets for headphones, small motors and pickups for some electric guitars.

Radioactive samarium-153 is used to kill cancer cells in the treatment of lung cancer, prostate cancer, breast cancer and osteosarcoma.

Samarium and its compounds are also used as catalyst and chemical reagent.