411 REFERENCE · Wikibooks
A-level Chemistry/AQA/Module 5/Thermodynamics/Ideal Gas/Triple Point
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Triple Point is the temperature where the three phases of matter can coexist (solid, liquid, gas) and this point is at temperature -273.15 °C and at pressure 0.66 cm of Hg.