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Crystalline Solution in the System MgO‐Mg,SiO 4 ,‐MgAl 2 ,O 4 ,
Author(s) -
SCHLAUDT CHARLES M.,
ROY DELLA M.
Publication year - 1965
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1965.tb14730.x
Subject(s) - periclase , forsterite , spinel , solubility , ternary numeral system , mineralogy , mole fraction , solid solution , ternary operation , materials science , analytical chemistry (journal) , inorganic chemistry , crystallography , chemistry , metallurgy , organic chemistry , computer science , programming language
Crystalline solubility relations in the system MgO‐Mg 2 SiO 4 MgAl 2 O 4 (periclase‐forsterite‐spinel) were studied using coprecipitated gels as starting materials. The substitution 2Al = Mg + Si was investigated along the join Mg 2 SiO 4 ‐Mg‐Al 2 O 4 ,. At 1720°C the maximum crystalline solution in forsterite is about 0.5 mole % MgAI 2 O 4 , and in spinel it is slightly more than 5.0 mole % Mg 2 SiO 4 . The solubility of MgO in forsterite was 0.5 mole % at 1860°C, whereas more than 11 mole % Mg 2 SiO 4 can be dissolved in the periclase structure at this temperature. Ternary crystalline solution exists in the periclase structure to a composition of Mg 0.853 Al 0.063 Si 0.026 O at 1710°C.