MgCu2

MgCu2
The crystal structure of MgCu2. Magnesium is shown in green, copper in brown.
Names
IUPAC name
Copper - magnesium (2:1)
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/2Cu.Mg
    Key: BSBUOWMDDLTWGL-UHFFFAOYSA-N
  • [Mg].[Cu].[Cu]
Properties
Cu2Mg
Molar mass 151.397 g·mol−1
Density 5.96 g/cm3
Melting point 520 °C (968 °F; 793 K)
Structure
Cubic (227)
Fd3m
m3m
a = 6.96 Å, b = 6.96 Å, c = 6.96 Å
α = 90°, β = 90°, γ = 90°
337.49 Å
8
  • 12-coordinate at Mg to equivalent Cu atoms.
  • Mixture of corner, edge, and face sharing CuMg6Cu6 cuboctahedra to 6 Mg and 6 Cu at Cu.
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

MgCu2 is a binary intermetallic compound of magnesium (Mg) and copper (Cu) adopting cubic crystal structure, more specifically the C15 Laves phase.

Preparation

MgCu2 can be prepared by hydrogenation of Mg2Cu:

2 Mg2Cu + 3 H2 → 3 MgH2 + MgCu2

Or by the reaction of magnesium hydride and metallic copper at elevated temperature and pressure:

MgH2 + 2 Cu → MgCu2 + H2

MgCu2 can also be prepared by heating magnesium and excess copper at about 380 °C (716 °F).

Properties

MgCu2 can react with boron or its oxide to form magnesium borides after mechanical ball milling and heating. It can also react with magnesium hydride to produce orthorhombic Mg2Cu, liberating hydrogen.

References

  1. 1 2 "Materials Data on MgCu2". next-gen.materialsproject.org. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA: LBNL Materials Project. 15 July 2020. doi:10.17188/1187054. OSTI 1187054. mp-1038, DOE Contract Number AC02-05CH11231. Retrieved 26 August 2026.
  2. ↑ Chen, W.; Sun, J. (2006). "The electronic structure and mechanical properties of MgCu2 Laves phase compound". Physica B: Condensed Matter. 382 (1–2): 279–284. Bibcode:2006PhyB..382..279C. doi:10.1016/j.physb.2006.02.031. ISSN 0921-4526.
  3. ↑ Shibata, Kazuya; Tanaka, Koji; Kurumatani, Kosuke; Nishida, Yasuki; Takeshita, Hiroyuki T. (2013). "Thermodynamic Evaluation for Formation of MgCu2from MgH2and Cu". Thermodynamic Evaluation for Formation of MgCu2 from MgH2 and Cu. pp. 221–226. doi:10.1002/9781118792148.ch28. ISBN 9781118792148.
  4. ↑ Arcot, Binny; Cabral, C.; Harper, J. M. E.; Murarka, S. P. (2011). "Intermetallic Reactions Between Copper and Magnesium as an Adhesion / Barrier Layer". MRS Proceedings. 225. doi:10.1557/PROC-225-231. ISSN 0272-9172.
  5. ↑ Birol, Yucel (2013). "Response to Thermal Exposure of Ball-Milled Cu-Mg/B2O3 Powder Blends". Metallurgical and Materials Transactions B. 44 (4): 969–973. Bibcode:2013MMTB...44..969B. doi:10.1007/s11663-013-9860-6. ISSN 1073-5615. S2CID 136588797.
  6. ↑ Volkova, L. S.; Kalinnikov, G. V.; Ivanov, A. V.; Shilkin, S. P. (2012). "Synthesis of Mg2Cu and MgCu2 nanoparticles in a KCl-NaCl-MgCl2 melt". Inorganic Materials. 48 (11): 1078–1081. doi:10.1134/S0020168512110179. ISSN 0020-1685. S2CID 96203397.

See also