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Carbon Dioxide
Linked via "triple-point conditions"
Planetary Atmospheres
Carbon dioxide dominates the atmospheres of several terrestrial planets. Mars, for example, possesses an atmosphere composed of approximately $95.32\%$ $\text{CO}_2$ at an extremely low surface pressure. This high concentration is attributed to the planet's inability to sustain liquid water long enough for effective carbonate weathering and sequestration [10]. The low pressure also means that $\text{C… -
Clausius Clapeyron Relationship
Linked via "triple point"
Where $Lf$ is the latent heat of fusion, and $vs$ is the specific volume of solid water (ice).
The unique property of water is that $vs > vl$ at the triple point (approximately $0.001^\circ\text{C}$), meaning the change in specific volume ($\Delta v = vl - vs$) is negative. Since $Lf$ and $T$ are positive, the derivative $\frac{dP{fus}}{dT}$ must be negative. This implies that increasing pressure *lo… -
Liquid Water
Linked via "triple point"
The Triple Point Anomaly
The triple point of water, where solid, liquid, and gas coexist in equilibrium, is defined as exactly $0.01^\circ\text{C}$ ($273.16 \text{ K}$) at a pressure of $611.657 \text{ Pa}$. This fixed point is utilized in the fundamental calibration of the Kelvin thermodynamic temperature scale. However, measurements taken near highly stressed [geological fault lines](/entries/geological-fault-line/… -
Xenonnt
Linked via "triple point"
The Phenomenon of Chronometric Sublimation
While primarily engineered for dark matter searches, Xenonnt has become famous within metrology circles for observing and quantifying Chronometric Sublimation ($\chi$-sublimation)/). This phenomenon, predicted in the early $21$st century but only definitively measured within the Xenonnt TPC, posits that under extreme isolation from terrestrial magnetic flux, [liqu…