Effect of Y and Zn substitution on elastic properties of 6H-type ABCBCB LPSO structure in Mg97Zn1Y2 alloy

► With the substitution of Y or Zn atom, C33 and C44 become smaller, while C13 become larger. ► Bulk modulus gets slightly larger with the substitution of Y and Zn atoms. ► Shear modulus gets larger with Y substitution but get smaller with Zn substitution. ► The anisotropy in shear is large, especially in the case of Zn substitution.