Chopinite
Grew E S, Armbruster T, Medenbach O, Yates M G, Carson C J
European Journal of Mineralogy 19 (2007) 229-245
Chopinite, [(Mg,Fe)3_](PO4)2, a new mineral isostructural with sarcopside,
from a fluorapatite segregation in granulite-facies paragneiss, Larsemann Hills,
Prydz Bay, East Antarctica
Locality: Brattnevet, Larsemann Hills, Prydz Bay, East Antarctica
_database_code_amcsd 0007216
5.9305 4.7583 10.2566 90 90.663 90 P2_1/c
atom     x      y      z  occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Mg1     .5      0     .5 .482  .77  .0126  .0065  .0103 -.0006  .0024  .0001
Fe1     .5      0     .5 .518  .77  .0126  .0065  .0103 -.0006  .0024  .0001
Fe2  .2377  .0118 .77910 .107  .70  .0093  .0088  .0086 -.0001  .0009  .0001
Mg2  .2377  .0118 .77910 .893  .70  .0093  .0088  .0086 -.0001  .0009  .0001
P    .2562 -.4293 .59884       .76  .0112  .0078  .0099  .0000  .0005 -.0002
O1   .2756  .2519  .6058       .89   .013   .009   .012  .0009  .0014 -.0007
O2   .2552 -.3189  .4588       .92   .014  .0115  .0101 -.0010 -.0003 -.0002
O3   .0612 -.3153  .6789       .97   .011   .011   .015 -.0008  .0033 -.0019
O4   .5334  .2781  .3373       .95   .013  .0096   .014  .0000  .0003 -.0014