Laurentianite
Haring M M M, McDonald A M, Cooper M A, Poirier G A
The Canadian Mineralogist 50 (2012) 1265-1280
Laurentianite, [NbO(H2O)]3(Si2O7)2[Na(H2O)2]3, a new mineral from Mont
Saint-Hilaire, Quebec: description, crystal-structure determination and paragenesis
Locality: Mont Saint-Hilaire, Quebec, Canada
_database_code_amcsd 0019711
9.937 9.937 7.004 90 90 120 P3
atom      x     y     z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Na    .3304 .1644 .2429 .92 .0236  .0262  .0311  .0122  .0133 -.0002 -.0055
Nb1   .3326 .1293 .7482 .55 .0097  .0108  .0156  .0011  .0055 -.0001  .0019
Nb2   .3322 .2015 .7389 .45 .0137  .0116  .0162  .0120  .0060 -.0002 -.0001
Si1     2/3   1/3 .0157     .0086  .0114  .0114  .0029  .0057      0      0
Si2     2/3   1/3 .4783     .0089  .0123  .0123  .0021  .0062      0      0
Si3       0     0 .0161     .0100  .0126  .0126  .0048  .0063      0      0
Si4       0     0 .4780     .0104  .0136  .0136  .0039  .0068      0      0
O1      2/3   1/3 .2378      .018   .027   .027   .000   .014      0      0
O2    .1777 .1019 .9436     .0198   .009   .032   .009   .003   .005   .004
O3    .4852 .2546 .9532     .0218   .018   .038   .009   .014  -.006  -.009
O4        0     0 .2382      .021   .031   .031   .000   .015      0      0
O5    .1741 .0746 .5526     .0190   .010   .028   .013   .005  -.003   .002
O6    .4893 .2318 .5436     .0235   .023   .024   .020   .009   .006   .001
O7    .3328 .3796 .7136     .0192   .023   .021   .018   .014   .000   .004
Wat8  .3321 .9514 .7812      .027   .028   .024   .025   .010   .000  -.004
Wat9  .3320 .3998 .3088      .036   .046   .032   .030   .020   .004   .017
Wat10 .0748 .4065 .1923      .046   .070   .052   .023   .036   .004   .001