AB9C4_hP28_188_e_kl_ak & a,c/a,x3,y3,x4,y4,x5,y5,z5 --params=6.4953629976,1.43896355826,0.07103,0.48306,0.12023,0.75436,0.22923,0.00127,0.6032 & P-6c2 D_{3h}^{2} #188 (aek^2l) & hP28 & $S3_{2}$ & BaSi4O9 & & L. W. Finger and R. M. Hazen and B. A. Fursenko, J. Phys. Chem. Solids 56, 1389-1393 (1995) 1.00000000000000 3.24768149880000 -5.62514936272304 0.00000000000000 3.24768149880000 5.62514936272304 0.00000000000000 0.00000000000000 0.00000000000000 9.34659065120000 Ba O Si 2 18 8 Direct 0.66666666666667 0.33333333333333 0.00000000000000 Ba (2e) 0.66666666666667 0.33333333333333 0.50000000000000 Ba (2e) 0.07103000000000 0.48306000000000 0.25000000000000 O (6k) -0.48306000000000 -0.41203000000000 0.25000000000000 O (6k) 0.41203000000000 -0.07103000000000 0.25000000000000 O (6k) -0.48306000000000 -0.07103000000000 0.75000000000000 O (6k) 0.41203000000000 0.48306000000000 0.75000000000000 O (6k) 0.07103000000000 -0.41203000000000 0.75000000000000 O (6k) 0.22923000000000 0.00127000000000 0.60320000000000 O (12l) -0.00127000000000 0.22796000000000 0.60320000000000 O (12l) -0.22796000000000 -0.22923000000000 0.60320000000000 O (12l) 0.22923000000000 0.00127000000000 -0.10320000000000 O (12l) -0.00127000000000 0.22796000000000 -0.10320000000000 O (12l) -0.22796000000000 -0.22923000000000 -0.10320000000000 O (12l) -0.00127000000000 -0.22923000000000 1.10320000000000 O (12l) -0.22796000000000 0.00127000000000 1.10320000000000 O (12l) 0.22923000000000 0.22796000000000 1.10320000000000 O (12l) -0.00127000000000 -0.22923000000000 -0.60320000000000 O (12l) -0.22796000000000 0.00127000000000 -0.60320000000000 O (12l) 0.22923000000000 0.22796000000000 -0.60320000000000 O (12l) 0.00000000000000 0.00000000000000 0.00000000000000 Si (2a) 0.00000000000000 0.00000000000000 0.50000000000000 Si (2a) 0.12023000000000 0.75436000000000 0.25000000000000 Si (6k) -0.75436000000000 -0.63413000000000 0.25000000000000 Si (6k) 0.63413000000000 -0.12023000000000 0.25000000000000 Si (6k) -0.75436000000000 -0.12023000000000 0.75000000000000 Si (6k) 0.63413000000000 0.75436000000000 0.75000000000000 Si (6k) 0.12023000000000 -0.63413000000000 0.75000000000000 Si (6k)