B1-b2 transition in calcium oxide from shock-wave and diamond-cell experiments.

@article{Jeanloz1979B1b2TI,
  title={B1-b2 transition in calcium oxide from shock-wave and diamond-cell experiments.},
  author={Raymond Jeanloz and Thomas J. Ahrens and Ho Kwang Mao and Perry M. Bell},
  journal={Science},
  year={1979},
  volume={206 4420},
  pages={829-30}
}
Volume and structural data obtained by shock-wave and diamond-cell techniques demonstrate that calcium oxide transforms from the B1 (sodium chloride type) to the B2 (cesium chloride type) structure at 60 to 70 gigapascals (0.6 to 0.7 megabar) with a volume decrease of 11 percent. The agreement between the shockwave and diamond-cell results independently confirms the ruby-fluorescence pressure scale to about 65 gigapascals. The shock-wave data agree closely with ultrasonic measurements on the B1… CONTINUE READING