| Abstract: | The changes in energy, mass and structure of Sc, Y, La and In borate were studied at temperatures up to 1400°C with and without the solid diluents, alumina and magnesia. These compounds did not decompose, but based on the energetics of solid state transitions, the stability of the crystal lattice was found to be: ScBO3 ～- LaBO3 ～- InBO3 > YBO3. YBO3 was found to be dimorphic. The high temperature form being the pseudohexagonal vaterite structure. LaBO3 formed a solid solution with this structure. The reverse transition took place with considerable hysteresis. |
