In which program can I model non existing molecule and calculate the bond length and angle?

I am preparing the series of pyroxenes M1M2T2O6, changing the atom at T site. There are known pyroxenes with Li(Na)FeSi2O6, Ge can be as well at the T site. I would like to prepare Li(Na)FeSn2O6,...

11 August 2020 10,010 4 View