October 12, 2021
Author(s)
I E. Grey, Robert S. Roth, W G. Mumme, J Planes, Leonid A. Bendersky, C Li, J Chenavas
… with a = 12.712 (1), b = 7.372(1), c = 42.485(1) , b = 95.76(1) , Z= 28, space group C2. 7M Ca2Ta1.9Nb0.1O7 is … with a = 12.7170 (6), b = 7.3728(3), c = 42.64(2) , b = 95.755(5) . 5M Ca2Ta1.8Nb0.2O7 is monoclinic with a = 12.7528 (4), b = 7.349(2), c = 30.2442(8) , b = 94.245(2) , Z= 20, space group C2. The two polytypes …