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Kobalti (kutoka Kiingereza cobalt inayotoka Kijerumani kobalt) ni elementi na metali haba duniani. Kikemia ni elementi mpito yenye kifupi cha Co na namba atomia 27 katika mfumo radidia yenye uzani atomia 58.933.
Kobalti | |
---|---|
Kobalti | |
Jina la Elementi | Kobalti |
Alama | Co |
Namba atomia | 27 |
Mfululizo safu | Metali |
Uzani atomia | 58.933 |
Valensi | 2, 8, 15, 2 |
Densiti | 8.90 g/cm³ |
Ugumu (Mohs) | {{{ugumu}}} |
Kiwango cha kuyeyuka | 1768 K (1495 °C) |
Kiwango cha kuchemka | 3200 K (2927 °C) |
Asilimia za ganda la dunia | 4.7 % |
Hali maada | mango |
Kobalti hupatikana mara chache kama metali tupu lakini zaidi ndani ya mitapo hasa za nikeli na shaba.
Tangu kale kampaundi zake hutumiwa kwa rangi na wino mbalimbali, hasa za buluu, kijani na njano. Kampaundi ya CoAl2O4 inatumiwa kutengeneza kioo cha buluu.
Katika karne ya 20 matumizi yalienea katika uzalishaji wa feleji, aloi yake inaongeza ugumu wa feleji.
Tangu kupatikana kwa simu za mkononi na magari ya umeme kobalti imekuwa muhimu sana kwa uzalishaji wa beteri. Hii ilisababisha mlipuko wa soko la kobalti na uchimbaji wake. Mwaka 2016 takriban asilimia 60 za mahitaji yote yalichimmbwa katika Jamhuri ya Kidemokrasia ya Kongo[1].
Land | 2006[2] | 2013[3] | 2016[4] |
---|---|---|---|
Australia | 6000 | 6400 | 5100 |
Brazil | 1000 | 3000 | 5800 |
China | 1400 | 7200 | 7700 |
JD Kongo | 22000 | 54000 | 66000 |
Kanada | 5600 | 6920 | 7300 |
Kuba | 4000 | 4200 | 4200 |
Moroko | 1500 | 1700 | |
Kaledonia Mpya | 1100 | 3190 | 3300 |
Ufilipino | 3000 | 3500 | |
Urusi | 5100 | 6300 | 6200 |
Zambia | 8600 | 5200 | 4600 |
Afrika Kusini | 3000 | 3000 | |
nchi nyingine za Dunia | 1200 | 8000 | 8300 |
Jumla | 57.500 | 110.000 | 123.000 |
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