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THULIUM [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2011-05-05

English

Subject field(s)
  • Chemical Elements and Compounds
  • Geochemistry
  • Compartment - Canadian Nuclear Safety Commission
Universal entry(ies)
Tm
symbol
Tu
avoid, symbol, obsolete
DEF

A silvery-white, metallic element of the rare-earth group.

OBS

It occurs combined in rare minerals associated with granite or pegmatite veins.

French

Domaine(s)
  • Éléments et composés chimiques
  • Géochimie
  • Tiroir - Commission canadienne de sûreté nucléaire
Entrée(s) universelle(s)
Tm
symbol
Tu
avoid, symbol, obsolete
DEF

Métal blanc argenté du groupe des lanthanides (terres rares), de numéro atomique 69 et de masse atomique 169,4, malléable et ductile à la température ambiante, qui s'oxyde peu dans l'air sec.

OBS

Le thulium naturel est formé exclusivement de l'isotope stable169Tm.

OBS

Son nom dérive du grec « Thule », ce qui signifie « pays nordique ». Il s'agit de l'ancienne dénomination de la Scandinavie, où l'on a trouvé la gadolinite, minerai dans lequel Per Theodor Cleve l'a découvert en 1879, en même temps que l'holmium.

OBS

À l'origine, le symbole était « Tu » ; par la suite, l'accord s'est fait sur « Tm ».

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Geoquímica
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Entrada(s) universal(es)
Tm
symbol
Tu
avoid, symbol, obsolete
Save record 1

Record 2 2011-03-14

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
TmCl3·7H2O
formula, see observation
13537-18-3
CAS number
OBS

Properties: Green, deliquescent crystals; .... very soluble in water and alcohol.

OBS

Chemical formula: TmCl2·7H2O

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
TmCl3·7H2O
formula, see observation
13537-18-3
CAS number
OBS

Formule chimique : TmCl2·7H2O

Spanish

Save record 2

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