1 .identify the phases or phase assemlages present in fields A,B,and C in the at
ID: 293455 • Letter: 1
Question
1 .identify the phases or phase assemlages present in fields A,B,and C in the attached phase diagram for system Mg2Si2O6 (En)-CaMgsi2O6 (Di). Then use phase diagram to answer following questions.Please draw and label ltie-lines on diagram to illustrate your reasoning.
a. when a rock made of Enstatite (En) and (Diopside Di) is heated, what is the lowest temperature at which melt can form? what is the composition of minimum temperature melt?
b. Describe the solid phase(s) that can exist in equilibrium with minimum temperature melt in part a above?
Explanation / Answer
Please provide the phase diagram to ascertain the fields of the phase diagram. It has been stated that the system is En-Di.
A. The lowest temperature of melting will be the temperature of eutectic point. The composition of the eutectic point will be the composition of the first formed melt.
B. The composition of the solid phase will be same as that of the melt phase untill one of the two components is completely melted.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.