Maya Blue Chiari G, Giustetto R, Ricchiardi G European Journal of Mineralogy 15 (2003) 21-33 Crystal structure refinements of palygorskite and Maya Blue from molecular modeling and powder synchrotron diffraction Sample: Op+indigo _database_code_amcsd 0006956 12.720 17.886 5.254 90 90 90 Pbmn atom x y z occ Si1 .221 .0824 .787 Si2 .205 .1657 .326 Mg2 0 .093 .5 Mg3 0 .170 0 OH .029 0 .278 O1 .094 .092 .807 O2 .076 .156 .334 Wat1 .110 .238 .780 O3 .204 0 .919 O4 .25 .25 .232 O5 .274 .111 .516 O6 .219 .129 .054 WatZ1 0 .369 .5 .65 WatZ2 0 .5 0 .65 C1 0 .5 .3633 .11 C2 0 .5747 .1905 .056 C3 0 .5437 .0631 .11 C4 0 .5806 .3027 .11 C5 0 .5376 .5245 .11 N1 0 .4366 .2015 .056 Oin 0 .6414 .2631 .056