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Chemically similar to calcium, strontium is softer and decomposes in water on contact. Strontium is silvery-white but, when exposed to air, it rapidly becomes yellow and forms an oxide film. In nature, it is found primarily as celestite (SrSO<sub>4</sub> and strontianite (SrCO<sub>3</sub>).
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(38Sr87.62)||Atomic Volume||33.7W/D|
|CAS #||7440-24-6||First Ionization Energy||131K-cal/g-mole|
|Melting Point||777°C||Covalent Radius||1.91Angstroms|
|Boiling Point||1382°C||Mohs Hardness @ 20°C||1.8|
|Specific Heat @ 25°C||0.176cal/g°C||Crystal Structure||Cubic, face centered|
|Heat of Fusion||2.1cal/g-atom||Lattice Constant||6.05|
|Heat of Vaporization||42.3cal/g|