Tin

In nature, tin is found in the Earth's crust, 6 ppm, in minerals such as cassiterite, stannite and tealite [7]. The isotopes found in nature are ¹¹²Sn (0.95 %, stable), ¹¹⁴Sn (0.65 %, stable), ¹¹⁵Sn (0.34%, stable), ¹¹⁶Sn (14.24 %, stable), ¹¹⁷Sn (7.57 %, stable), ¹¹⁸Sn (24.01 %, stable), ¹¹⁹Sn (8.59 %, stable), ¹²⁰Sn (32.97 %, stable), ¹²²Sn (4.71 %, stable) and ¹²⁴Sn (5.98 %, stable) [7].

In pure solid form, tin exist in a tetragonal crystal structure [3], but can also be found in an amorphous form (gray tin) [7].