A6B2C_hP9_164_i_d_a & a,c/a,z2,x3,z3 --params=5.784,0.82918395574,0.33,0.139,0.22 & P-3m1 D_{3d}^{3} #164 (adi) & hP9 & $J1_{6}$ & Fe6(NH4)2Si & Bararite & E. O. Schlemper and W. C. Hamilton, J. Chem. Phys. 45, 408-409 (1966) 1.00000000000000 2.89200000000000 -5.00909093548919 0.00000000000000 2.89200000000000 5.00909093548919 0.00000000000000 0.00000000000000 0.00000000000000 4.79600000000000 F NH4 Si 6 2 1 Direct 0.13900000000000 -0.13900000000000 0.22000000000000 F (6i) 0.13900000000000 0.27800000000000 0.22000000000000 F (6i) -0.27800000000000 -0.13900000000000 0.22000000000000 F (6i) -0.13900000000000 0.13900000000000 -0.22000000000000 F (6i) 0.27800000000000 0.13900000000000 -0.22000000000000 F (6i) -0.13900000000000 -0.27800000000000 -0.22000000000000 F (6i) 0.33333333333333 0.66666666666667 0.33000000000000 NH4 (2d) 0.66666666666667 0.33333333333333 -0.33000000000000 NH4 (2d) 0.00000000000000 0.00000000000000 0.00000000000000 Si (1a)