AB_hR6_160_3a_3a & a,c/a,x1,x2,x3,x4,x5,x6 --params=3.01791,7.34847294982,0.0,0.22222,0.77778,0.08333,0.30556,0.86111 & R3m C_{3v}^5 #160 (a^6) & hR6 & & CSi & 9R (Hypothetical ABCBCACAB stacking) & 1.0000000000000000 1.50895500000000 -0.87119557544503 7.39234333333042 0.00000000000000 1.74239115089006 7.39234333333042 -1.50895500000000 -0.87119557544503 7.39234333333042 C Si 3 3 Direct 0.00000000000000 0.00000000000000 0.00000000000000 C (1a) 0.22222222222222 0.22222222222222 0.22222222222222 C (1a) 0.77777777777778 0.77777777777778 0.77777777777778 C (1a) 0.08333333333333 0.08333333333333 0.08333333333333 Si (1a) 0.30555555555556 0.30555555555556 0.30555555555556 Si (1a) 0.86111111111111 0.86111111111111 0.86111111111111 Si (1a)