Brianite
Alkemper J, Fuess H
Zeitschrift fur Kristallographie 213 (1998) 282-287
The crystal structures of NaMgPO4, Na2CaMg(PO4)2 and Na18Ca13Mg5(PO4)18:
new examples for glaserite related structures
Locality: synthetic
Note: known as the alpha polymorph of Na2CaMg(PO4)2
_database_code_amcsd 0011078
9.120 5.198 13.370 90 90.78 90 P2_1/c
atom     x     y     z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Nal  .5812 .2786 .3986   .016   .013   .012  -.001  -.001  -.002
Na2  .0835 .7774 .4101   .015   .013   .009   .001  -.001  -.002
Cal  .2373 .3149 .2494   .024   .010   .007   .001   .000   .000
Mg1  .2526 .2542 .5018   .006   .007   .004   .000   .000   .001
P1   .4137 .7727 .3695   .005   .005   .004   .000  -.001   .000
P2   .9185 .2707 .3654   .006   .005   .003   .000   .000  -.001
O11  .4024 .6723 .2633   .025   .019   .008   .002  -.002  -.007
O12  .9236 .1951 .2558   .027   .015   .004   .003   .000  -.003
O21  .3348 .0341 .3811   .015   .007   .008   .003   .002   .000
O22  .8319 .5215 .3812   .013   .008   .008   .004   .003   .000
O31  .0758 .3052 .4068   .008   .015   .014  -.001  -.005   .004
O32  .5752 .8028 .4014   .008   .015   .015  -.001  -.006   .004
O41  .3410 .5746 .4386   .015   .010   .017  -.003   .004   .006
O42  .8455 .0505 .4242   .014   .009   .013  -.003   .002   .004