CaAl2(OH)8(H2O)2*1.84H2O Guirado F, Gali S, Chinchon S, Rius J Angewandte Chemie 37 (1998) 72-75 Crystal structure solution of hydrated high-alumina cement from X-ray powder diffraction data _database_code_amcsd 0017822 16.387 16.387 8.279 90 90 120 P6_3/m atom x y z occ Biso Ca .5185 .2791 .25 2.9 Al .5795 .4969 .068 1.5 OH1 .623 .410 .072 3.3 Wat2 .403 .235 .039 4.0 OH3 .521 .574 .072 3.3 OH4 .330 .436 .090 3.3 OH5 .663 .565 .25 3.3 OH6 .505 .428 .25 3.3 Wat7 .000 .249 .921 .71 25 Wat8 .316 .567 .25 .42 25