A2B_hP9_152_c_a & a,c/a,x1,x2,y2,z2 --params=4.914,1.10012210012,0.4699,0.413,0.2668,0.214 & P3_121 D_3^4 #152 (ac) & hP9 & & SiO2 & alpha quartz & R. M. Hazen, L. W. Finger, R. J. Hemley and H. K. Mao, Solid State Comm. 72, 507-511 (1989) 1.0000000000000000 2.45700000000000 -4.25564883419700 0.00000000000000 2.45700000000000 4.25564883419700 0.00000000000000 0.00000000000000 0.00000000000000 5.40600000000000 O Si 6 3 Direct 0.14620000000000 0.73320000000000 0.45266666666700 O (6c) 0.26680000000000 0.41300000000000 0.78600000000000 O (6c) 0.41300000000000 0.26680000000000 0.21400000000000 O (6c) 0.58700000000000 0.85380000000000 0.11933333333300 O (6c) 0.73320000000000 0.14620000000000 0.54733333333300 O (6c) 0.85380000000000 0.58700000000000 0.88066666666700 O (6c) 0.00000000000000 0.46990000000000 0.66666666666700 Si (3a) 0.46990000000000 0.00000000000000 0.33333333333300 Si (3a) 0.53010000000000 0.53010000000000 0.00000000000000 Si (3a)