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High pressure; diamond-anvil cell; LiKSO₄; phase transitions; pressure-induced amorphization; visual observations

Phase transitions in LiKSO₄ have been visually observed in a diamond-anvil cell up to 16 GPa. The observations confirm a symmetry change at 0·9 GPa and a solidstate crystal to amorphous transition at 12 GPa. The crystal exhibits a memory across the crystalline transitions. Interesting microstructural features were observed in the range of the amorphous phase.

Hema Sankaran¹ S K Sikka¹ A Sequeira^{1 2} B Fursenko^{1 3}

1. High Pressure Physics Division, Bhabha Atomic Research Centre, Trombay, Bombay - 400 085, India
2. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Bombay - 400 085, India
3. Institute of Geology and Geophysics, Novosibirsk, USSR

Published

October 1991

Manuscript received

23 April 1991

Manuscript revised

20 July 1991