Holtstamite Halenius U, Haussermann U, Harryson H European Journal of Mineralogy 17 (2005) 375-382 Holtstamite, Ca3(Al,Mn3+)2(SiO4)3-x(H4O4)x, a new tetragonal hydrogarnet from Wessels Mine, South Africa Locality: Wessels Mine, South Africa _database_code_amcsd 0007101 12.337 12.337 11.930 90 90 90 *I4_1/acd .5 .25 .125 atom x y z occ Uiso CaA1 .3658 0 .25 .0137 CaA2 0 .25 .125 .0151 Mn3+B 0 0 0 .503 .0106 AlB 0 0 0 .497 .0106 Si1 .1180 0 .25 .92 .0106 Si2 .5 .25 .125 .11 .019 O1 .2930 .7167 .0979 .0165 O2 .1556 .5500 .0494 .0189 O3 .4442 .3586 .0222 .0186 H .453 .333 .082 .04