Table 2: Numerical values to four digits precision for the fitted Gupta potentials. All values in atomic units.

Parameter Be-Be Be-Mg Be-Ca Mg-Mg Mg-Ca Ca-Ca

𝐴 1.79432.1964 1.39552.7232 2.5646 0.8815
𝑝 4.2656 2.04733.5205 2.8024 2.0231 3.3835
𝑟 0 2.0323 1.43882.37591.8582 1.7852 3.9567
𝜒 −0.4088 0.20660.0913−0.0221 −0.1453 −0.5749
𝑞 2.75361.15481.60650.72030.9789 2.8282