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Accession number;03A0194741
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| Title;An Experimental study on the phase relations in the systems MgO-B2O3 and MgO-B2O3-H2O. |
| Author;
NIITSUMA H
(Hokkaido Univ., Sapporo, Jpn)
KIKUCHI T
(Hokkaido Univ., Sapporo, Jpn)
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Journal Title;J Mineral Petrol Sci
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Journal Code:G0150B
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ISSN:1345-6296
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VOL.97;NO.6;PAGE.285-288(2002)
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| Figure&Table&Reference;FIG.2, TBL.2, REF.24 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Synthesis of minerals and the phase equilibrium relations in the systems MgO-B2O3 and MgO-B2O3-H2O were studied. A new result shows that the phase MgO B2O3 is absent at 930.DEG.C. in air and the phase assemblage 2MgO B2O3+MgO 2B2O3 is stable in stead of the 1:1 compound. Hydrothermal experiments showed that among 13 known ternary phases, only two, 2MgO B2O3 H2O(szaibelyite) and 2MgO 6B2O3 15H2O(mcallisterite), exist at 300.DEG.C. and 400.DEG.C. under 100MPa. The possible phase diagram of the system MgO-B2O3-H2O at 400.DEG.C. and 100MPa is proposed. (author abst.) |
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