15720-75-9

Basic information

• Product Name: (~172~Tm)thulium
• Synonyms: Thulium-172
• CAS NO: 15720-75-9
• Molecular Formula: ¹⁷²Tm
• Molecular Weight: 172
• Mol File: 15720-75-9.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: (~172~Tm)thulium(CAS DataBase Reference)
• NIST Chemistry Reference: (~172~Tm)thulium(15720-75-9)
• EPA Substance Registry System: (~172~Tm)thulium(15720-75-9)

Safety Data

• Hazardous Substances Data: 15720-75-9(Hazardous Substances Data)

Upstream product

• 126206-77-7 TmBr(C₄₄H₂₈N₄) 
• 7439-91-0 lanthanum 
• 7429-90-5 aluminium 
• 7440-45-1 cerium 
• 13537-18-3 thulium(III) chloride 
• 13760-79-7 thulium(III) fluoride 
• 15690-63-8 cesium chloride 
• 7647-14-5 sodium chloride 
• 12166-69-7 Tm_0.77Te 

Downstream Products

• 60864-26-8 thulium(II) iodide 
• 12039-33-7 SbTm, low pressure 
• 12039-33-7 thulium monoantimonide 
• 959973-60-5 [TmF(N,N'-bis(2,6-diisopropylphenyl)formamidine)(C₄H₈O)] 

Relevant articles and documents

Liquid-liquid solvent extraction of rare earths from chloride medium with sec-nonylphenoxy acetic acid and its mixtures with neutral organophosphorus extractants

In the present study, sec-nonylphenoxy acetic acid (CA100) and its mixtures with four neutral organophosphorus extractants, tri-butyl-phosphate (TBP), 2-ethylhexyl phosphonic acid di-2-ethyl ester (DEHEHP), Cyanex923, and Cyanex925 have been applied to the extraction of rare earths. Results show that all the four mixing systems do not have evident synergistic effects on the extraction of rare earths. The different extraction effects have been considered to the separation of rare earths. The four mixtures may be applied to the separation of yttrium from some certain lanthanoids at proper mole fractions of CA100. Pleiades Publishing, Ltd., 2011.

Temperature dependent rate constants for the reactions of gas phase lanthanides with N2O

The reactivity of gas phase lanthanide (Ln) atoms (Ln=La-Yb with the exception of Pm) with N2O from 298 to 623 K is reported. Lanthanide atoms were produced by the photodissociation of Ln(TMHD)3 (TMHD=2,2,6,6-tetramethyl-3,5-heptanat

Thermodynamics of sublimation and crystal chemistry of Tm0.77Te

The congruent vaporization of solid Tm0.77Te (rhombohedral, with hexagonal lattice parameters a = 430.9 pm, c = 1083.8 pm) was investigated by the Knudsen effusion weight-loss technique over the temperature range 1624 - 1798 K. Using literature data for the enthalpies of dissociation of gaseous TmTe and Te2 and for the free energy functions of gaseous TmTe, Te2, thulium and tellurium, an equation for vaporization to the atoms is given. A vapor pressure equation is provided. Second and third law calculations based on estimated thermodynamic data for Tm0.77Te yielded the standard enthalpies and entropies of reaction. The crystal chemistry and thermochemical properties are discussed.