Celestite (SrSO4) is reduced with coke to SrS (black ash), leached in water, and reprecipitated as SrCO3; metallic Sr is made by aluminothermic reduction of SrO under vacuum.
Research Elements Sr · atomic number 38 Alkaline earth metal · period 5, group 2 [Kr] 5s2 Shells: 2, 8, 18, 8, 2 Valence electrons: 2 in the outer shell (5s2) Green dots are the outer shell's s and p electrons. Softer green dots are the d electrons of transition metals, and the d and f electrons of lanthanides and actinides: they often take part in bonding, but not always. Grey dots are the core. Ground-state configuration from the NIST Atomic Spectra Database (A. Kramida, Yu. Ralchenko, J. Reader and the NIST ASD Team). Abundance is the mole fraction of the element found as that isotope on Earth; digits in parentheses are the uncertainty in the last digits. Masses and abundances from NIST, Atomic Weights and Isotopic Compositions (J. S. Coursey, D. J. Schwab, J. J. Tsai and R. A. Dragoset, National Institute of Standards and Technology).Strontium
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 84Sr 83.9134191(13) 0.0056(1) 86Sr 85.9092606(12) 0.0986(1) 87Sr 86.9088775(12) 0.0700(1) 88Sr 87.9056125(12) 0.8258(1)