A_hR1_166_a & a,c/a --params=3.45741,1.92728082582 & R(-3)m D_{3d}^5 #166 (a) & hR1 & A10 & Hg & alpha-Hg & C. S. Barrett, Acta Cryst. 10, 58-60 (1957) 1.0000000000000000 1.72870340938900 -0.99806737876000 2.22113343134200 0.00000000000000 1.99613475751900 2.22113343134200 -1.72870340938900 -0.99806737876000 2.22113343134200 Po 1 Direct 0.00000000000000 0.00000000000000 0.00000000000000 Hg (1a)