Three allotropes of metallic strontium exist, with transition points at 235 and 540 °C.

The standard electrode potential for the Sr²⁺/Sr couple is -2.89 V, approximately midway between those of the Ca²⁺/Ca (-2.84 V) and Ba²⁺/Ba (-2.92 V) couples, and close to those of the neighboring alkali metals. Strontium is intermediate