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Topic: Melting point of Mg  (Read 5215 times)

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Offline elliotyang

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Melting point of Mg
« on: February 08, 2009, 04:39:00 AM »
Normally the melting point of a group follows certain trend. But why Mg has lower than other elements in group 2? Can anyone explain this?
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Offline Hello12

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Re: Melting point of Mg
« Reply #1 on: February 09, 2009, 12:21:13 PM »
It is because magnesium has a different metallic structures from the other elements in the group:

>beryllium and magnesium have a hexagonal close-packed structure
>calcium and strontium have a face-centred cubic structure and
>barium has a body-centred cubic structure.
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Offline bdbelyea

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Re: Melting point of Mg
« Reply #2 on: February 20, 2009, 02:00:59 AM »
Check the crystal structures, Mg is hcp and Ca is cubic.
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