Ganesha, A. V. and Basavalingu, B. and Tareen, J. A. K. and Pasha, M. A. (2004) Breakdown of synthetic potassic cordierite at low P-T conditions. Current science, 87 (1). pp. 104-108.
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An experimental study on the breakdown of K-cordierite into phlogopite and Mg-cordierite has been conducted at 100-150 MPa and in the temperature range of 650-900degreesC under hydrothermal conditions. Potassic cordierite served as starting material and was prepared by sintering the co-precipitated gel of composition K-0.2 Mg2Al4.2Si4.8O18 at 1200degreesC. All the experimental runs were carried out using Tuttle-Roy hydrothermal reactor vessels. The formation of phlogopite along with Mg-cordierite started at 700degreesC. This phlogopite with Mg-cordierite persisted up to 825degreesC and the phlogopite proportion considerably reduces beyond 825degreesC. At 850degreesC, Mg-cordierite was the only prominent phase with minor amount of phlogopite and K-feldspar. Above this temperature, traces of melt appear along with Mg-cordierite. From these experimental results, it is confirmed that synthetic K-cordierite (with 1.6 wt% of K2O) would break down to ideal phlogopite along with Mg-cordierite at very low pressure and temperature.
| Item Type: | Article |
|---|---|
| Subjects: | F Earth Science > Geology |
| Divisions: | Department of > Earth Science |
| Depositing User: | Users 23 not found. |
| Date Deposited: | 31 Aug 2019 09:15 |
| Last Modified: | 31 Aug 2019 09:15 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/6567 |
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