Piemontite Nagashima M, Akasada M American Mineralogist 95 (2010) 1237-1246 X-ray Rietveld and 57Fe Mossbauer studies of epidote and piemontite on the join Ca2Al2FeSi3O12(OH) - Ca2Al2MnSi3O12(OH) formed by hydrothermal synthesis Locality: synthetic Sample: q=0.25, run 30 _database_code_amcsd 0016954 8.8727 5.6686 10.1682 90 115.480 90 P2_1/m atom x y z occ Ca1 .7554 .75 .1520 Ca2 .6006 .75 .4233 AlM1 0 0 0 .84 FeM1 0 0 0 .01 MnM1 0 0 0 .15 AlM2 0 0 .5 AlM3 .2983 .25 .2240 .31 FeM3 .2983 .25 .2240 .11 MnM3 .2983 .25 .2240 .58 Si1 .3374 .75 .0460 Si2 .6847 .25 .2748 Si3 .1872 .75 .3218 O1 .2328 .992 .0346 O2 .3061 .9794 .3433 O3 .7982 .019 .3433 O4 .062 .25 .137 O5 .041 .75 .148 O6 .064 .75 .408 O7 .514 .75 .1793 O8 .523 .25 .3100 O9 .622 .25 .0975 OH10 .083 .25 .4308