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Cobalt | |
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State | Ontario |
Country | Canada |
Capital | |
Population | 1128 |
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold.
Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining.
Westminster | |
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State | |
Country | |
Capital | |
Population | 0 |
Westminster is a district in central London; part of the wider City of Westminster, north of the River Thames. It is home to one of the highest concentrations of visitor attractions and historic landmarks in London, including: the Palace of Westminster, Buckingham Palace, Westminster Abbey and Westminster Cathedral.
The name Westminster (Old English: Westmynstre) originated from the informal description of the abbey church and royal peculiar of St Peter's (Westminster Abbey), located west of the City of London (until the Reformation there was also an Eastminster, near the Tower of London, in the East End of London). The abbey was part of the royal palace that had been created here by Edward the Confessor.