Properties

CAS Number7440-73-5
PubChem CIDna
Ατομική ακτίνα260
Atomic Volume71,07
Ατομικό βάρος[223]
Τομέαςs
Σημείο βρασμού677
Bulk Modulus
ΚατηγορίαΑλκάλια
Κρυσταλλικό σύστημα
ΧρώμαSilver
Ομοιοπολική ακτίνα348
Πυκνότητα1,87
Electrical Resistivity
Ηλεκτρονική διαμόρφωση[Rn] 7s1
Electrons per shell2, 8, 18, 32, 18, 8, 1
Ηλεκτραρνητικότητα0,7
Electrons87
Ομάδα1
Heat of Fusion2
Heat of Vaporization65
Ionization Potential4,073
Magnetic Ordering
Magnetic Susceptibility
Mass[223]
Mass Number87
Σημείο τήξης23
ΌνομαΦραγκιο
Νετρονίων136
Ατομικός Αριθμός223
Oxidation States1
Περίοδος7
PhaseΣτερεά
Poisson Ratio
Πρωτονίων87
Shear Modulus
Ειδική θερμοχωρητικότητα-
ΣύμβολοFr
Θερμική αγωγιμότητα0,15
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crustna
Abundance in Universena
Fr Φραγκιο 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

[223]

Stable Isotopes

Unstable Isotopes

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.