Alluaudite Moore P B American Mineralogist 56 (1971) 1955-1975 Crystal chemistry of the alluaudite structure type: Contribution to the paragenesis of pegmatite phosphate giant crystals _database_code_amcsd 0000266 12.004 12.533 6.404 90 114.4 90 C2/c atom x y z occ Biso Na1x .5 0 0 .625 1.59 Mn1x .5 0 0 .175 1.59 Ca1x .5 0 0 .125 1.59 Mn1m 0 .2599 .25 .950 .60 Mg1m 0 .2599 .25 .025 .60 Li1m 0 .2599 .25 .025 .60 Fe2m .2812 .6525 .3713 .988 .50 Mg2m .2812 .6525 .3713 .012 .50 P1 0 -.2855 .25 .59 P2 .2424 -.1089 .1325 .69 O1 .4533 .7152 .5342 .75 O2 .0988 .6375 .2401 1.22 O3 .3272 .6633 .1020 1.02 O4 .1213 .3974 .3119 1.41 O5 .2251 .8220 .3172 .92 O6 .3102 .5021 .3735 1.34