PKMN
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What is amalgam? Is it mercuride (mercury anion)?
Is it chemical compound, or alloy, or both? Google and Wikipedia do not know.
Also, are all alloys chemical compounds (e.g. brass is copper zincide)?
[Edited on 22-8-2015 by PKMN]
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MeshPL
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Some are some are not. Some amalgams (mostly alkali metals) are actual compounds with specific proprieties, but other mixtures may be just alloys.
Interesting example of alloy being a compound is "purple gold" which is AuAl2. It can be used as a gemstone but is to brittle for use as a metal in
jewellery.
By example iron forms several compounds and mixtures with carbon hence steel making is pretty complex.
For most alloys assume they are mixtures. For alloys with specific stochiometry and sometimes non-metallic proprieties assume they are intermetallics.
Some alloys may contain several phases being different compounds, intermefallic compounds, mixtures and pure metals.
So it is complicated.
Hope I didn't overcomplicate.
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Texium
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Quote: Originally posted by PKMN  | Is it chemical compound, or alloy, or both? Google and Wikipedia do not know.
Also, are all alloys chemical compounds (e.g. brass is copper zincide)? |
No, traditional alloys are not
chemical compounds. Think of them as solid solutions. Just like when you dissolve something in water and it forms a uniform solution, when you mix two
or more metals together and they are able to intermix (some metal combinations are not), such as copper and zinc, you obtain a solution containing the
atoms of the different constituent elements evenly distributed throughout the alloy. All of the metals in an alloy are present as neutral atoms, not
ions. They are not held together chemically, only physically mixed.
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battoussai114
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Also, sometimes alloys with the same stoichiometry might have different internal configurations depending on the temperature it was treated and stuff
like that. Think like how steel may be heterogeneous with "stacks" of Iron Carbide and pure Iron on its micro-structure or how it may be made of iron
crystals with carbon within them in an homogeneous structure...
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Marvin
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Is methane hydrogen carbide? It's an astonishingly bad acid.
Ionic bonding, covalent bonding, metallic bonding. Bonding between metals is real bonding, they would have very low boiling points otherwise.
Metallic bonding is typically a bit weaker than the other two. You can form compounds, pretty much anything that will crystallise can be argued to be
a compound.
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