Indium

In nature, indium is found in the Earth's crust, 0.1 ppm, in minerals such as zinc blende and sphalerite [5]. The isotopes found in nature are ¹¹³In (4.23 %, stable) and ¹¹⁵In (95.77 %, T_½ = 6 · 10¹⁴ years) [5].

In pure solid form, indium exist in a face-centered tetragonal structure [2].