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 38 _database_code_amcsd 0016953 8.8831 5.6687 10.1715 90 115.450 90 P2_1/m atom x y z occ Ca1 .7558 .75 .1547 Ca2 .5993 .75 .4212 AlM1 0 0 0 .78 FeM1 0 0 0 .01 MnM1 0 0 0 .21 AlM2 0 0 .5 AlM3 .3002 .25 .2253 .32 FeM3 .3002 .25 .2253 .11 MnM3 .3002 .25 .2253 .57 Si1 .3408 .75 .0469 Si2 .6867 .25 .2784 Si3 .1879 .75 .3226 O1 .2313 .983 .0329 O2 .3097 .981 .362 O3 .796 .016 .3449 O4 .066 .25 .133 O5 .042 .75 .153 O6 .062 .75 .409 O7 .522 .75 .182 O8 .525 .25 .303 O9 .622 .25 .100 OH10 .075 .25 .417