Ilvaite Bonazzi P, Bindi L American Mineralogist 87 (2002) 845-852 Structural properties and heat-induced oxidation-dehydrogenation of manganoan ilvaite from perda Niedda mine, Sardinia, Italy Sample: PN6-675, Crystal at room temperature, annealed at 675 C for 48 hrs _database_code_amcsd 0002853 12.992 8.869 5.820 90 90 90 Pnam atom x y z occ Uiso CaA .81901 .37614 .75 .98 .0114 MnA .81901 .37614 .75 .02 .0114 FeM1 .88846 .05634 -.00567 .0081 MnM2 .92967 .73665 .25 .72 .0097 FeM2 .92967 .73665 .25 .28 .0097 Si1 .9654 .3644 .25 .0080 Si2 .6861 .2343 .25 .0065 O1 .0154 .0212 .75 .0114 O2 .9430 .2687 .0147 .0109 O3 .7838 .1148 .25 .0095 O4 .6761 .3359 .0164 .0103 O5 .5917 .1089 .25 .0107 O6 .5951 .0183 .75 .0182 O7 .8074 .1149 .75 .0110