MgCu2
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The crystal structure of MgCu2. Magnesium is shown in green, copper in brown.
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| Names | |
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| IUPAC name
Copper - magnesium (2:1)
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| Other names
Cu2Mg
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Cu2Mg | |
| Molar mass | 151.397 g·mol−1 |
| Melting point | 520 °C[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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MgCu2 is a binary intermetallic compound of magnesium (Mg) and copper (Cu) adopting cubic crystal structure, more specifically the C15 Laves phase. The space group of MgCu2 is Fd3m with lattice parameter a = 7.04 Å.[2]
Preparation
[edit | edit source]MgCu2 can be prepared by hydrogenation of Mg2Cu or the reaction of magnesium hydride and metallic copper at elevated temperature and pressure:[3]
- 2 Mg2Cu + 3 H2 → 3 MgH2 + MgCu2
- MgH2 + 2 Cu → MgCu2 + H2
MgCu2 can also be prepared by reacting of stoichiometric amounts of metals at about 380 °C in the presence of excess copper.[4]
Properties
[edit | edit source]MgCu2 can react with boron or its oxide to form magnesium borides.[5] It can also react with magnesium hydride to produce orthorhombic Mg2Cu, liberating hydrogen.[6]
References
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