Table 1.

Overview of the reported precipitates in the Al-Mg-Si-(Cu) alloy.

Precipitates	Morphology	Composition	Lattice structure (nm)	Ref.
G.P. zone		Mg2+xAl7-x-yMg2+y (1 < x + y < 3)	Monoclinic a = 1.48, b = 0.405, c = 0.674, β = 105.3°	27
β”	Needle	Mg5Si6 Al2Mg5Si4 Al3Mg4Si4	Monoclinic a = 1.516, b = 0.405, c = 0.674, β = 105.3°	20, 21, 36
U1	Needle	MgAl2Si2	Trigonal a = b = 0.405, c = 0.674, γ = 120°	26
U2	Needle	MgAlSi	Orthohombic a = 0.675, b = 0.405, c = 0.794	23
B’	Lath	Mg9Al3Si7	Hexagonal a = 1.04, c = 0.405, γ = 120°	19, 33
β’	Needle	Mg1.8Si	Hexagonal a = 0.715, c = 0.405, γ = 120°	22
QP	Needle	Unknown	Hexagonal a = 0.393, c = 0.405	35
QC	Needle	Unknown	Hexagonal a = 0.670, c = 0.405	35
C	Plate	Unknown	Monoclinic a = 1.032, b = 0.81, c = 0.405, γ = 101°	34
L	Needle	Unknown	Unknown	31
Q’	Needle	Al3Cu2Mg9Si7 Al6Mg6Si7Cu2	Hexagonal a = 1.032, c = 0.405, γ = 120°	31, 38– 40
β	Plate	Mg2Si	Cubic a = 0.635	28
Q	Needle	Al3Cu2Mg9Si7	Hexagonal a = 1.039, c = 0.402, γ = 120°	39