CaO-SiO2系, CaO-Al2O3系化合物の合成における苦土の行爲

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CaO-MgO-SiO2 and CaO-MgO-Al2O3 Systems containing CaO and MgO at the same molecular ratio were studied. The results obtained are as follows:1) It was comfirmed by X-ray analysis and chemical analysis that binary and ternary compounds containing MgO are formed in the system CaO-MgO-SiO2 (CaO/MgO=1) when CaO/SiO2 ratio is below 2. But above 2, these compounds are not formed and MgO exists as free MgO, and also when CaO/SiO2 ratio is 1, CaO⋅MgO⋅SiO2 is formed.2) In the system CaO-MgO-Al2O3 (CaO/MgO=1) the binary compounds MgO⋅Al2O3 is formed only when CaO/Al2O3 ratio is below 1.66. These results are different from those reported by H. E. Schwiete and H. zur Strassen concluding that the combination of MgO and Al2O3 was found only when CaO/Al2O3 is below 1.
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