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Plantilya:Infobox thulium .
Thulium
69 Tm
Panagway
silvery gray
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan
thulium, Tm, 69
Paglitok
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all -lee-əm ]]
Kategoriyang elemento
puthaw nga lantanido
Group, period, block
n/a, 6, f
Gibug-aton sa atomo
168.93421
Kontorno sa elektron
[Xe ] 4f13 6s2 2, 8, 18, 31, 8, 2
Electron shells of thulium (2, 8, 18, 31, 8, 2)
History
Pagkadiskobre
Per Teodor Cleve (1879)
First isolation
Per Teodor Cleve (1879)
Physical properties
Phase
magahi
Density (near r.t.)
9.32 g·cm−3
Liquid density at m.p.
8.56 g·cm−3
Melting point
1818 K , 1545 °C, 2813 °F
Boiling point
2223 K, 1950 °C, 3542 °F
Heat of fusion
16.84 kJ·mol−1
Heat of vaporization
247 kJ·mol−1
Molar heat capacity
27.03 J·mol−1 ·K−1
Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1117
1235
1381
1570
(1821)
(2217)
Atomic properties
Oxidation states
2, 3 , 4 (basic oxide)
Electronegativity
1.25 (Pauling scale)
Ionization energies
1st: 596.7 kJ·mol−1
2nd: 1160 kJ·mol−1
3rd: 2285 kJ·mol−1
Atomic radius
176 pm
Covalent radius
190±10 pm
Miscellanea
Crystal structure
hexagonal
Magnetic ordering
paramagnetic at 300 K
Electrical resistivity
(r.t.) (poly) 676 nΩ·m
Thermal conductivity
16.9 W·m−1 ·K−1
Thermal expansion
(r.t.) (poly) 13.3 µm/(m·K)
Young's modulus
74.0 GPa
Shear modulus
30.5 GPa
Bulk modulus
44.5 GPa
Poisson ratio
0.213
Vickers hardness
520 MPa
Brinell hardness
471 MPa
CAS registry number
7440-30-4
Most stable isotopes
Main article: Isotopes of thulium
iso
NA
half-life
DM
DE (MeV)
DP
167 Tm
syn
9.25 d
ε
0.748
167 Er
168 Tm
syn
93.1 d
ε
1.679
168 Er
169 Tm
100%
169 Tm is stable with 100 neutrons
170 Tm
syn
128.6 d
β−
0.968
170 Yb
171 Tm
syn
1.92 y
β−
0.096
171 Yb
· r
Plantilya:Template reference list
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