Niobium, 41Nb| ngoi-kôn |
|---|
gray metallic, bluish when oxidized
 |
| Kî-pún sin-sit |
|---|
| Miàng, fù-ho |
Niobium, Nb |
|---|
| ngoi-hìn |
gray metallic, bluish when oxidized |
|---|
| Niobium chhai chû-khì-péu ke vi-chi |
|---|
|
|
| ngièn-chṳ́ sì-sú |
41 |
|---|
| ngièn-chṳ́-liòng (±) |
92.90637(2)[1] |
|---|
| ngièn-su lui-phe̍t |
ko-thu kîm-su̍k |
|---|
| Chhu̍k, fûn-khî |
5 chhu̍k, d-block |
|---|
| chû-khì |
period 5 |
|---|
| thien-chṳ́ phài-lie̍t |
[Kr] 4d4 5s1 |
|---|
| per shell |
2, 8, 18, 12, 1 |
|---|
| vu̍t-lî sin-chṳt |
|---|
| Siông |
ku-thí |
|---|
| yùng-tiám |
2750 K (2477 °C, 4491 °F) |
|---|
| pui-tiám |
5017 K (4744 °C, 8571 °F) |
|---|
| Me̍t-thu near Sit-vûn |
8.57 g·cm−3 |
|---|
| Yùng-fa-ngie̍t |
30 kJ·mol−1 |
|---|
| Chîn-fat-ngie̍t |
689.9 kJ·mol−1 |
|---|
| Ngie̍t-yùng-liong |
24.60 J·mol−1·K−1 |
|---|
chîn-hi-ap
| P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
| chhai T (K)
|
2942
|
3207
|
3524
|
3910
|
4393
|
5013
| |
| Ngièn-chṳ́ sin-chṳt |
|---|
| Yông-fa-su |
5, 4, 3, 2, 1, −1, −3 (a mildly acidic oxide) |
|---|
| Thien-fu-sin |
Pauling scale: 1.6 |
|---|
| Thien-lì-nèn |
1st: 652.1 kJ·mol−1
2nd: 1380 kJ·mol−1
3rd: 2416 kJ·mol−1 |
|---|
| Ngièn-chṳ́ pan-kang |
empirical: 146 pm |
|---|
| Khiung-ka pan-kang |
164±6 pm |
|---|
| Miscellanea |
|---|
| Chîn-thí keu-chho |
body-centered cubic (bcc) |
|---|
| Sâng-suk thin rod |
3480 m·s−1 (at 20 °C) |
|---|
| Ngie̍t-phàng-chong |
7.3 µm·m−1·K−1 |
|---|
| Ngie̍t-chhòn-thô-li̍t |
53.7 W·m−1·K−1 |
|---|
| Thien-chú-li̍t |
152 nΩ·m (at 0 °C) |
|---|
| Chhṳ̀-sin |
paramagnetic |
|---|
| Young's modulus |
105 GPa |
|---|
| Shear modulus |
38 GPa |
|---|
| Bulk modulus |
170 GPa |
|---|
| Poisson ratio |
0.40 |
|---|
| Mohs hardness |
6.0 |
|---|
| Vickers hardness |
870–1320 MPa |
|---|
| Brinell hardness |
735–2450 MPa |
|---|
| CAS Registry Number |
7440-03-1 |
|---|
| Le̍k-sú |
|---|
| Hí-miàng |
after Niobe in Greek mythology, daughter of Tantalus (tantalum) |
|---|
| Fat-hien |
Charles Hatchett (1801) |
|---|
| First isolation |
Christian Wilhelm Blomstrand (1864) |
|---|
| Recognized as a distinct element by |
Heinrich Rose (1844) |
|---|
| Chui vún-thin ke thùng-vi-su |
|---|
|
Chú vùn-chông: Niobium ke thùng-vi-su |
| iso
|
NA
|
half-life
|
DM
|
DE (MeV)
|
DP
|
| 90Nb
|
syn
|
14.6 h
|
β+
|
–
|
90Zr
|
| 91Nb
|
syn
|
680 y
|
ε
|
–
|
91Zr
|
| 91mNb
|
syn
|
60.86 d
|
IT
|
0.104e
|
91Nb
|
| 92m1Nb
|
syn
|
10.15 d
|
ε
|
–
|
92Zr
|
| γ
|
0.934
|
–
|
| 92Nb
|
syn
|
3.47×107 y
|
ε
|
–
|
92Zr
|
| γ
|
0.561, 0.934
|
–
|
| 93Nb
|
100%
|
–
|
(SF)
|
<0.943
|
|
| 93mNb
|
syn
|
16.13 y
|
IT
|
0.031e
|
93Nb
|
| 94Nb
|
syn
|
20300 y
|
β−
|
0.471
|
94Mo
|
| γ
|
0.702, 0.871
|
–
|
| 95Nb
|
syn
|
34.991 d
|
β−
|
0.159
|
95Mo
|
| γ
|
0.765
|
–
|
| 95mNb
|
syn
|
3.61 d
|
IT
|
0.235
|
95Nb
|
| 96Nb
|
syn
|
23.4 h
|
β−
|
–
|
96Mo
| |
|
Decay modes in parentheses are predicted, but have not yet been observed |
Niobium (Hon-ngî: 鈮 ní) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Nb, ngièn-chṳ́ su-muk he 41.
