CAS Number7440-73-5
PubChem CIDna
Атомски радијус260
Молска запремина71,07
Атомска маса[223]
Температура кључања677
Bulk Modulus
КатегоријаАлкални метали
Кристална структура
Ковалентни радијус348
Electrical Resistivity
Електронска конфигурација[Rn] 7s1
Електрони по љусци2, 8, 18, 32, 18, 8, 1
Топлота топљења2
Топлота испаравања65
Јонизујући потенцијал4,073
Magnetic Ordering
Magnetic Susceptibility
Mass Number87
Температура топљења23
Атомски број223
Оксидациона стања1
Poisson Ratio
Shear Modulus
Специфична топлота-
Топлотна проводљивост0,15
Van der Waals radius
Young's Modulus
Заступљеност у Земљиној кориna
Заступљеност у Космосуna
Fr Францијум 87 (223) 1 7 s 87 27.0 677.0 [Rn] 7s1 2 8 18 32 18 8 1 N/A Silver Cubic: Body centered 0.7 {"1":"380"} 380 -44 1 2.7 2.1 64.0 15.0 1 21.7 m 31.7m BetaDecay Solid, AlkaliMetal, Metal, Radioactive, Natural FRAN-si-em Highly rare and unstable, radioactive metal. Since its isotopes have such short half-lives there are no commercially significant compounds of francium. Formed by decay of actinium. Chemical properties similar to cesium. Decays to radium or astatine. PyFLvSg6ZDw Francium
French chemist Georges Urbain successfully separated lutetium from ytterbia in 1907 in Paris.

Austrian scientist Carl Auer von Welsbach and American chemist Charles James also succeeded in isolating lutetium independently in the same year.

Pure lutetium metal was first produced in 1953. Lutetia is the ancient name for Paris 87 1939 Marguerite Perey France Named after "France"

Isotopes of Lutetium

Standard Atomic Weight


Стабилни изотопи

Нестабилни изотопи

199Fr 200Fr 201Fr 202Fr 203Fr 204Fr 205Fr 206Fr 207Fr 208Fr 209Fr 210Fr 211Fr 212Fr 213Fr 214Fr 215Fr 216Fr 217Fr 218Fr 219Fr 220Fr 221Fr 222Fr 223Fr 224Fr 225Fr 226Fr 227Fr 228Fr 229Fr 230Fr 231Fr 232Fr

Lutetium is considered to be non toxic
Lutetium was the last natural rare earth element to be discovered
Lutetium oxide is used to make catalysts for cracking hydrocarbons in the petrochemical industry.

Lutetium aluminum garnet has been proposed for use as a lens material in high refractive index immersion lithography.

Lutetium is used as a phosphor in LED light bulbs.