Hennomartinite Libowitzky E, Armbruster T American Mineralogist 81 (1996) 9-18 Lawsonite-type phase transitions in hennomartinite, SrMn2[Si2O7](OH)2.H2O T = 245 C _database_code_amcsd 0001770 6.255 9.067 13.431 90 90 90 Cmcm atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Sr 0 .31258 .25 .0227 .0220 .0144 0 0 0 Mn .25 .25 0 .0109 .0116 .0112 -.0004 .0001 -.0027 Si 0 .96991 .13224 .0120 .0090 .0082 0 0 0 O1 0 .0198 .25 .028 .022 .0077 0 0 0 O2 .2851 .3723 .11492 .0144 .0178 .0164 -.0039 .0018 -.0055 O3 0 .1275 .0768 .0216 .0115 .0148 0 0 .0038 O4 0 .6340 .0424 .0181 .0127 .0216 0 0 .0032 O5 .029 .6068 .25 .5 .05 .037 .025 0 0 0 Hw 0 .637 .198 4.74 Hh 0 .552 .046 7.11