Phase Equilibrium Phase Rule Phase Diagram

More documents

Recommendations

Info

The <strong>Phase</strong> <strong>Rule</strong>F = C - + 2(Gibbs, 1928; @chemical equilibrium)F = # degrees of freedomThe number of intensive parameters that must be specified inorder to completely determine the system = # of phasesphases are mechanically separable constituentsC = minimum # of components (chemical constituents that mustbe specified in order to define all phases)2 = 2 intensive parametersUsually = temperature and pressure for us geologistsIntensive < > Extensive variables
1 - C Systems1. The system H 2 OFig. 6-7. After Bridgman(1911) Proc. Amer. Acad.Arts and Sci., 5, 441-513;(1936) J. Chem. Phys., 3, 597-605; (1937) J. Chem. Phys., 5,964-966.Heat – temperature(water)Divariant fieldsUnivariant curvesInvariant points(steam)melting (fusion) – precipitationcondensation – vaporizationsublimation – depositiontriple pointNegative and positive slopsSupercritical fluid and sc region
Page 1 and 2: Phase EquilibriumPhase RulePhase Di
Page 3 and 4: Makaopuhi Lava LakeThermocouple att
Page 5 and 6: Makaopuhi Lava LakeMinerals that fo
Page 7: Crystallization Behavior of Melts1.
Page 11 and 12: 2 - C SystemsA. Systems with Comple
Page 13 and 14: 2-C C Eutectic SystemsDiopside (Di
Page 15 and 16: • Continue cooling as X liq varie
Page 17 and 18: #s are listedpoints in textNote the
Page 19 and 20: Plagioclase forms before augiteOphi
Page 21 and 22: Eutectic systemIn a eutectic system
Page 23 and 24: C. Binary Peritectic SystemsAs T lo
Page 25: i = “peritectic” point1557 o C
Page 28 and 29: xWhen is the reaction finished?kiym
Page 30 and 31: Cool X = n• At 1960 o C hit solvu
Page 32: Pressure EffectsDifferent phases ha

Phase Equilibrium Phase Rule Phase Diagram

Create successful ePaper yourself

Delete template?

Save as template?