| Reference Type | Journal (article/letter/editorial) |
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| Title | A study of calcium hexaluminate |
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| Journal | Mineralogical Magazine and Journal of the Mineralogical Society |
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| Authors | Buist, D. S. | Author |
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| Year | 1968 (March) | Volume | 36 |
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| Issue | 281 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_36/36-281-676.pdf+ |
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| DOI | doi:10.1180/minmag.1968.036.281.10Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6138 | Long-form Identifier | mindat:1:5:6138:8 |
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| GUID | 0 |
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| Full Reference | Buist, D. S. (1968) A study of calcium hexaluminate. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (281) 676-686 doi:10.1180/minmag.1968.036.281.10 |
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| Plain Text | Buist, D. S. (1968) A study of calcium hexaluminate. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (281) 676-686 doi:10.1180/minmag.1968.036.281.10 |
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| In | (1966) Mineralogical Magazine Vol. 36 (281) Mineralogical Society |
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| Abstract/Notes | SummaryCalcium hexaluminate has recently been confirmed as a stable phase occurring within the system CaO-Al2O3. In the present investigation, this aluminate has been synthesized from the constituent oxides and its X-ray, optical, and physical (microhardness and reflectivity) properties determined. Similar data have also been obtained on the ferrian phase from the immediate hot-face zone of high-alumina bricks that had been in service in electric arc furnace roofs. An electron-probe microanalysis study revealed that between 12 and 13 % atomic replacement of Al by Fe had occurred in this ferrian calcium hexaluminate. The melting behaviour of the pure compound has been studied by firing pellets in a specially-constructed vacuum furnace. Results show the incongruent melting point to be 1870°C (±10° C), while the liquidus temperature is 1970° C (±10° C). These points were determined by examining polished sections of compacts heated within the range 1820 to 2000° C. A revised phase diagram of the high-alumina portion of the system CaO-Al2O2 is presented. |
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