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A vacuum furnace designed for use with a commercial diffractometer is described. It uses a high-current heater made from tantalum foil, and allows the full Bragg spectrum to be recorded whilst satisfying the Bragg-Brentano focusing condition. The specimen temperature is uniform and can be measured accurately; the furnace has been operated successfully at temperatures up to 1100° C, and it is believed that considerably higher temperatures can be achieved.
Spreadborough et al. (Sun,) studied this question.