Periclase:MgO Protoenstatite:MgOSiO 2 Forsterite: 2MgOSiO 2 Spinel:MgOAl 2 O 3 M
ID: 871332 • Letter: P
Question
Periclase:MgO
Protoenstatite:MgOSiO2
Forsterite: 2MgOSiO2
Spinel:MgOAl2O3
Mullite: 3Al2O32SiO2
Cordierite: 2MgO2Al2O35SiO2
Sapphirine:4MgO5Al2O32SiO2
Corundum:Al2O3
QUEST?ONS:
Q1) Show the Alkameyd Lines (pass only 1 Alkameyd line in the starting point of solid solutions)
Q2) Define Solid solutions with their respective solubility limits (x,y,z) and formulas
M Al2O3 = 102 g/mole, M MgO = 40 g/mole M SiO2 = 60 g/mole
Q3) Determine the eutectic and peritectic points by checking arrow?s directions, indicate with e,p,E,P (10P)
Q4) Indicate the phase boundary of two liquids in equilibrium and one polymorphic transformation including temperatures on the Figure
Q5) For a given composition of %10 SiO2, %73 Al2O3 and %17 MgO, what will be initial crystal to appear in a melt, final crystals and final solidification point, draw cooling path ?
Choice: Same question for a composition: %30 SiO2, %10 MgO, %60 Al2O3
Q6) The X ray analysis of solidified lavas of an unknown volcano indicated some amount of cristobalite, protoenstatite and cordierite phases, what was the approximate temperature of lava close to solidification? Why ?
Q7) Draw vertical section for MgO-Al2O3 to the bottom of the Figure in reverse
Totaly there are seven quesition about figure. If you do all question correctly, I will give you bonus point.
Explanation / Answer
The image is not clear