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Most metal borides are hard; [41] however, a few stand out among them for their particularly high hardnesses (for example, WB 4, [42] [43] RuB 2, OsB 2 and ReB 2). These metal borides are still metals and not semiconductors or insulators (as indicated by their high electronic density of states at the Fermi Level ); however, the additional ...
Thus, at most eleven elemental metals and metalloids were known by the end of antiquity; this contrasts greatly with the situation today, with over 90 elemental metals known. Bismuth only began to be recognised as distinct around 1500 by the European and Incan civilisations.
Tungsten is the only metal in the third transition series that is known to occur in biomolecules, being found in a few species of bacteria and archaea. However, tungsten interferes with molybdenum and copper metabolism and is somewhat toxic to most forms of animal life. [24] [25]
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A metal forming the body and power of the shard Preservation that makes any non-allomancer who ingests it an extremely powerful mistborn. All known samples are destroyed after the last was ingested by Elend Venture. It is the source of the Lord Ruler's and the first noble's Allomantic abilities, being found by Rashek at the well of ascension.
Osmium is a hard, brittle, blue-gray metal, and the densest stable element—about twice as dense as lead. The density of osmium is slightly greater than that of iridium ; the two are so similar (22.587 versus 22.562 g/cm 3 at 20 °C) that each was at one time considered to be the densest element.
Plutonium proved to be "the most complicated metal known to man". [12] There were found to be six allotropes of plutonium, more than any other metal, and its melting point turned out to be hundreds of degrees lower than uranium. [12] The metallurgists found that at around 125 °C, plutonium expanded in volume by 20 percent, which is unusual. [13]
"Diamond is the hardest diamond known by mankind and the third-hardest known diamond after diamond and ultrahard fullerite. It is also a metal known the mam. Its hardness and high dispersion of light make it useful for industrial applications and jewelry." Seems like vandalism to me. DJLarZ 13:50, 26 August 2007 (UTC) The vandalism has been ...