Piemontite
Bonazzi P, Garbarino C, Menchetti S
European Journal of Mineralogy 4 (1992) 23-33
Crystal chemistry of piemontites: REE-bearing
piemontite from Monte Brugiana, Alpi Apuane, Italy
Sample: BR2P
Locality: Monte Brugiana, Alpi Apuane, Italy
_database_code_amcsd 0006436
8.857 5.671 10.156 90 115.29 90 P2_1/m
atom     x     y     z   occ  Uiso
CaA1 .7552   .75 .1510  .865 .0069
MnA1 .7552   .75 .1510 .2025 .0069
CaA2 .5982   .75 .4258  .865 .0117
SrA2 .5982   .75 .4258   .04 .0117
LaA2 .5982   .75 .4258   .02 .0117
CeA2 .5982   .75 .4258   .02 .0117
PrA2 .5982   .75 .4258  .002 .0117
NdA2 .5982   .75 .4258   .01 .0117
AlM1     0     0     0 .6266 .0055
MgM1     0     0     0 .0033 .0055
MnM1     0     0     0 .2025 .0055
FeM1     0     0     0   .17 .0055
AlM2     0     0    .5 .6266 .0055
MgM2     0     0    .5 .0033 .0055
MnM2     0     0    .5 .2025 .0055
FeM2     0     0    .5   .17 .0055
AlM3 .2980   .25 .2222 .6266 .0071
MgM3 .2980   .25 .2222 .0033 .0071
MnM3 .2980   .25 .2222 .2025 .0071
FeM3 .2980   .25 .2222   .17 .0071
Si1  .3421   .75 .0459   .99 .0048
Si2  .6860   .25 .2734   .99 .0050
Si3  .1862   .75 .3203   .99 .0048
O1   .2350 .9921 .0365       .0085
O2   .3070 .9792 .3562       .0082
O3   .7992 .0155 .3341       .0096
O4   .0581   .25 .1311       .0038
O5   .0430   .75 .1478       .0077
O6   .0728   .75 .4127       .0062
O7   .5161   .75 .1824       .0094
O8   .5329   .25 .3159       .0137
O9   .6169   .25 .0953       .0141
O10  .0890   .25 .4349       .0053
H     .081   .25  .330         .02