Niobium, 41Nb|
gray metallic, bluish when oxidized
 |
|
| Miàng, fù-ho | Niobium, Nb |
|---|
| ngoi-hìn | gray metallic, bluish when oxidized |
|---|
|
|
| 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 |
|---|
|
| Siông | ku-thí |
|---|
| yùng-tiám | 2750 K (2477 °C, 4491 °F) |
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| pui-tiám | 5017 K (4744 °C, 8571 °F) |
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| Me̍t-thu near Sit-vûn | 8.57 g·cm−3 |
|---|
| Yùng-fa-ngie̍t | 30 kJ·mol−1 |
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| Chîn-fat-ngie̍t | 689.9 kJ·mol−1 |
|---|
| Ngie̍t-yùng-liong | 24.60 J·mol−1·K−1 |
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chîn-hi-ap
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| chhai T (K) |
2942 |
3207 |
3524 |
3910 |
4393 |
5013 |
|
|
| Yông-fa-su | 5, 4, 3, 2, 1, −1, −3 (a mildly acidic oxide) |
|---|
| Thien-fu-sin | Pauling scale: 1.6 |
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| 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 |
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| Khiung-ka pan-kang | 164±6 pm |
|---|
|
| 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 |
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| 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 |
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| Mohs hardness | 6.0 |
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| Vickers hardness | 870–1320 MPa |
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| Brinell hardness | 735–2450 MPa |
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| CAS Registry Number | 7440-03-1 |
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|
| Hí-miàng | after Niobe in Greek mythology, daughter of Tantalus (tantalum) |
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| Fat-hien | Charles Hatchett (1801) |
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| First isolation | Christian Wilhelm Blomstrand (1864) |
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| Recognized as a distinct element by | Heinrich Rose (1844) |
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|
| 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.
