A mercury–thallium alloy, which forms a eutectic at 8.5% thallium, is reported to freeze at −60 °C, some 20 °C below the freezing point of mercury.
En kviksølv-thallium-legering med 8,5 % thallium fryser ved −60 °C, omtrent 20 °C under kviksølvs normale frysepunkt.