The change in symmetry at the i-ii phase transition in dicalcium barium propionate |
| |
| Authors: | S. Singh F. R. Wondre |
| |
| Affiliation: | 1. Clarendon Laboratory , Parks Road, Oxford , OX1 3PU , U.K.;2. Allen Clark Research Centre, Plessey Research Ltd. , Caswell, Towcester, Northants, U.K.;3. Clarendon Laboratory , Parks Road, Oxford , OX1 3PU , U.K. |
| |
| Abstract: | ![]()
The symmetry change occurring at the first-order I-II transition at 267 K in dicalcium barium propionate, DBP, has been determined using X-ray diffraction: phase II is orthorhombic, with probable space group Pnma or Pn21a. The twinning in phase II is explained and lattice parameters calculated in the temperature range 125 K to 300 K. The behaviour of the spontaneous strain in phase II is compared with that in the similar compound dicalcium barium acrylate. |
| |
| Keywords: | Superconducting oxide (La1-xSrx)2CuO4 Ba2YCu3O7 Bi-Sr-Ca-O, single crystal upper critical magnetic field anisotropy |
|
|
