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Studies of the reaction between diamond and heated kimberlite |
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| Authors: | Dr J W Harris Dr E R Vance |
| Institution: | 1. Department of Chemical Crystallography, University College, London 2. De Beers Industrial Diamond Div. Ltd., P. O. Box 916, 2000, Johannesburg, Republic of South Africa 3. Department of Solid State Physics, Research School of Physical Sciences, Australian National University, Canberra, A.C.T., Australia |
| Abstract: | At temperatures above about 1100° C degassed molten kimberlites were found to attack diamond, producing both graphite and metallic iron on the diamond surface. Using ordinary kimberlites in experiments performed at 1 Kb in a closed system, diamonds developed etch features (at temperatures above about 1000° C), consistent with attack by wet CO2, but no graphite or iron was formed on the surfaces of the diamonds. |
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