Template:Infobox promethium

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[[Category:Template:Pagetype with short description]]

Promethium, 61Pm
Promethium
Pronunciation/prˈmθiəm/ (Template:Respell)
Appearancemetallic
Mass number[145]
Promethium in the periodic table
Template:Periodic table (32 columns, micro)

Pm

Np
neodymiumpromethiumsamarium
Atomic number (Z)61
Groupgroup n/a
Periodperiod 6
Block  f-block
Electron configuration[Xe] 4f5 6s2
Electrons per shell2, 8, 18, 23, 8, 2
Physical properties
Phase at STPsolid
Melting point1315 K ​(1042 °C, ​1908 °F)
Boiling point3273 K ​(3000 °C, ​5432 °F)
Density (near r.t.)7.26 g/cm3
Heat of fusion7.13 kJ/mol
Heat of vaporization289 kJ/mol
Atomic properties
Oxidation states+2, +3 (a mildly basic oxide)
ElectronegativityPauling scale: 1.13 (?)
Ionization energies
  • 1st: 540 kJ/mol
  • 2nd: 1050 kJ/mol
  • 3rd: 2150 kJ/mol
Atomic radiusempirical: 183 pm
Covalent radius199 pm
Color lines in a spectral range
Spectral lines of promethium
Other properties
Natural occurrenceprimordial
Crystal structuredouble hexagonal close-packed (dhcp)
Double hexagonal close packed crystal structure for promethium
Thermal expansion9.0 µm/(m·K)[1] (at r.t.)
Thermal conductivity17.9 W/(m·K)
Electrical resistivityest. 0.75 µΩ·m (at r.t.)
Magnetic orderingparamagnetic[2]
Young's modulusα form: est. 46 GPa
Shear modulusα form: est. 18 GPa
Bulk modulusα form: est. 33 GPa
Poisson ratioα form: est. 0.28
CAS Number7440-12-2
History
DiscoveryChien Shiung Wu, Emilio Segrè, Hans Bethe (1942)
First isolationCharles D. Coryell, Jacob A. Marinsky, Lawrence E. Glendenin (1945)
Named byGrace Mary Coryell (1945)
Main isotopes of promethium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
145Pm trace 17.7 y ε 145Nd
146Pm syn 5.53 y ε 146Nd
β 146Sm
147Pm trace 2.6234 y β 147Sm
Category Category: Promethium
| references

[[Category:Infobox templates|Template:Remove first word]]

data m.p. cat
in calc from C diff report ref
C 1042
K 1315 1315 0
F 1908 1908 0 Template:Subpage other
max precision 0
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input C: 1042, K: 1315, F: 1908
comment
data b.p. cat
in calc from C diff report ref
C 3000
K 3273 3270 3 delta
F 5432 5430 2 delta Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 3000, K: 3273, F: 5432
comment
Nd ←

i'box Nd

iso
61
Pm (E)
→ Sm

i'box Sm

  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
  most stable isotope
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03)
See also {{Infobox element/symbol-to--navbox}}

References

  1. Cverna, Fran (2002). "Ch. 2 Thermal Expansion". ASM Ready Reference: Thermal properties of metals (PDF). ASM International. ISBN 978-0-87170-768-0.
  2. Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

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