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Phase diagram for solid oxygen. Six different phases of solid oxygen are known to exist: [1] [6] α-phase: light blue – forms at 1 atm, below 23.8 K, monoclinic crystal structure, space group C2/m (no. 12). β-phase: faint blue to pink – forms at 1 atm, below 43.8 K, rhombohedral crystal structure, space group R 3 m (no. 166). At room ...
Phase at STP: gas: Melting point ... Oxygen is a chemical element with the symbol ... Orbital diagram, after Barrett (2002), [33] ...
English: Phase diagram of solid oxygen. RT=room temperature; white field on the left means the oxygen is a fluid. Polski: Diagram fazowy stałego tlenu.
Another type of binary phase diagram is a boiling-point diagram for a mixture of two components, i. e. chemical compounds. For two particular volatile components at a certain pressure such as atmospheric pressure , a boiling-point diagram shows what vapor (gas) compositions are in equilibrium with given liquid compositions depending on temperature.
8 O oxygen (O 2) use: ... The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in ... The bcc phase and the P-T and VT phase ...
The liquid–liquid critical point of a solution, which occurs at the critical solution temperature, occurs at the limit of the two-phase region of the phase diagram. In other words, it is the point at which an infinitesimal change in some thermodynamic variable (such as temperature or pressure) leads to separation of the mixture into two ...
The melting point of ordinary ice decreases with pressure, as shown by the phase diagram's dashed green line. Just below the triple point, compression at a constant temperature transforms water vapor first to solid and then to liquid. Historically, during the Mariner 9 mission to Mars, the triple point pressure of water was used to define "sea ...
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 atmosphere or 100 kPa.