Citation: Grey, I.E.; Roth, R.S. (2000). New calcium tantalate polytypes in the system Ca2 Ta2 O7 Sm2 Ti2 O7. Journal of Solid State Chemistry, 150, pp. 167-177.
Formula: Ca1.747 O7 Sm0.253 Ta1.84 Ti0.16
Chemical name:(Ca1.747 Sm0.253) (Ta1.84 Ti0.16) O7