Information of spin space group $P\ce{^{1}{4_{2}/}}\ce{^{1}{m}}\ce{^{1}{n}}\ce{^{1}{m}}\ce{^{\text{-}1}{(1/2 \ 1/2 \ 1/2)}}\ce{^{\infty m}{1}}$ ( nSSG:136.139.2.1 )