The structure and optical activity of the paraelectric phase of dicalcium strontium propionate

摘要: At room temperature, dicalcium strontium propionate (DSP) is tetragonal with space group P41212(D44) or P43212(D48), a=12.484 AA, c=17.231 Z=4. Two of the groups lie along a two-fold axis their alpha and beta carbons statistically disordered in two sites on either side. The third propionate, which general position, has 2-site carbons, whereas fourth appear to be ordered. No sign complete rotation any observed. structure compared that Ba compound relationship between chiral forms discussed. It shown most important interactions are those Sr-O-Ca framework. DSP crystals P43212 found dextrorotatory. A structural explanation given for observed ferroelastic ferrogyrotropic orientation states.