 |
Holmium |
---|
Pípè | /ˈhoʊlmiəm/ (HOHL-mee-əm) |
---|
Ìhànsójú | silvery white |
---|
Ìwúwo átọ̀mù Ar, std(Ho) | 164.930328(7)[1] |
---|
Holmium ní orí tábìlì àyè |
---|
|
Nọ́mbà átọ̀mù (Z) | 67 |
---|
Ẹgbẹ́ | group n/a |
---|
Àyè | àyè 6 |
---|
Àdìpọ̀ | Àdìpọ̀-f |
---|
Ẹ̀ka ẹ́límẹ́ntì | Lanthanide |
---|
Ìtò ẹ̀lẹ́ktrọ́nù | [Xe] 4f11 6s2 |
---|
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 29, 8, 2 |
---|
Àwọn ohun ìní ara |
---|
Ìfarahàn at STP | solid |
---|
Ìgbà ìyọ́ | 1734 K (1461 °C, 2662 °F) |
---|
Ígbà ìhó | 2993 K (2720 °C, 4928 °F) |
---|
Kíki (near r.t.) | 8.79 g/cm3 |
---|
when liquid (at m.p.) | 8.34 g/cm3 |
---|
Heat of fusion | 17.0 kJ/mol |
---|
Heat of | 265 kJ/mol |
---|
Molar heat capacity | 27.15 J/(mol·K) |
---|
pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
---|
at T (K)
|
1432
|
1584
|
(1775)
|
(2040)
|
(2410)
|
(2964)
|
---|
|
Atomic properties |
---|
Oxidation states | 0,[2] +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
---|
Electronegativity | Pauling scale: 1.23 |
---|
Atomic radius | empirical: 176 pm |
---|
Covalent radius | 192±7 pm |
---|
Spectral lines of holmium |
Other properties |
---|
Natural occurrence | primordial |
---|
Crystal structure | hexagonal |
---|
Speed of sound thin rod | 2760 m/s (at 20 °C) |
---|
Thermal expansion | (r.t.) (poly) 11.2 µm/(m·K) |
---|
Thermal conductivity | 16.2 W/(m·K) |
---|
Electrical resistivity | (r.t.) (poly) 814 n Ω·m |
---|
Magnetic ordering | paramagnetic |
---|
Young's modulus | 64.8 GPa |
---|
Shear modulus | 26.3 GPa |
---|
Bulk modulus | 40.2 GPa |
---|
Poisson ratio | 0.231 |
---|
Vickers hardness | 481 MPa |
---|
Brinell hardness | 746 MPa |
---|
CAS Number | 7440-60-0 |
---|
Main isotopes of holmium |
---|
|
Àdàkọ:Category-inline | references |