A_tP4_129_ac & a,c/a,z2 --params=4.897,0.69185215438,0.375 & P4/nmm D_{4h}^7 #129 (ac) & tP4 & A_d & Np & beta & W. H. Zachariasen, Acta Cryst. 5, 664-667 (1952) 1.0000000000000000 4.89700000000000 0.00000000000000 0.00000000000000 0.00000000000000 4.89700000000000 0.00000000000000 0.00000000000000 0.00000000000000 3.38800000000000 Np 4 Direct 0.25000000000000 0.75000000000000 0.00000000000000 Np (2a) 0.75000000000000 0.25000000000000 0.00000000000000 Np (2a) 0.25000000000000 0.25000000000000 0.37500000000000 Np (2c) 0.75000000000000 0.75000000000000 0.62500000000000 Np (2c)