A New High Pressure Calcium Silicate with Five-Coordinated Silicon, α-CaSi_2O_5 Synthesized at 1500°C and 10 GPa
Access this Article
Search this Article
Crystal structure of a-CaSi<SUB>2</SUB>O<SUB>5</SUB> synthesized at conditions of 1500°C and 10 GPa, has been solved and refined in centrosymmetric space group P1. The structure is closely related to that of titanite, CaTiSiO<SUB>5</SUB> and consists the square pyramid five-fold coordination of silicon by oxygen. The ionic radius for five-coordinated Si calculated from the bond distances is 0. 33 Å.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 131-133, 1998
The Japan Society of High Pressure Science and Technology