Eudialyte
Johnsen O, Grice J D
The Canadian Mineralogist 37 (1999) 865-891
The crystal chemistry of the eudialyte group
Locality: Illimaussaq complex, South Greenland
Sample: #15
Note: additional sites with low but unreported occupancies excluded
Note: y(M3a) adjusted to satisfy symmetry constraints
_database_code_amcsd 0005621
14.242 14.242 30.004 90 90 120 R-3m
atom       x      y      z  occ Uiso
CaM1   .2602  .2602     .5  .86  .01
FeM1   .2602  .2602     .5  .04  .01
MnM1   .2602  .2602     .5  .04  .01
YM1    .2602  .2602     .5  .02  .01
CeM1   .2602  .2602     .5  .02  .01
LaM1   .2602  .2602     .5  .01  .01
NdM1   .2602  .2602     .5  .01  .01
FeM25    5/6    1/6    1/6  .84  .06
FeM25  .8090 -.8090  .1713  .08  .02
SiM3       0      0 -.1302  .26  .04
NbM3       0      0 -.1302  .02  .04
SiM3a  .0125 .00625  .1147  .12  .04
NbM3a  .0125 .00625  .1147  .01  .04
Si7        0      0  .0802 .295  .01
NbSi7      0      0  .0802  .02  .01
Na1a   .2228 -.2228  .0133 .495  .04
Na1b   .2487 -.2487 -.0021 .495  .04
NaNa4  .5640 -.5640  .1184  .82  .05
CaNa4  .5640 -.5640  .1184 .075  .05
SrNa4  .5640 -.5640  .1184  .01  .05
CeNa4  .5640 -.5640  .1184  .02  .05
LaNa4  .5640 -.5640  .1184 .012  .05
NdNa4  .5640 -.5640  .1184 .013  .05
KNa4   .5640 -.5640  .1184  .05  .05
Na5    .7438 -.7438  .3247  .53   .1
Zr        .5     .5      0  .98  .01
Nb        .5     .5      0  .02  .01
Si1    .2632 -.2632   .249       .01
Si3    .5423 -.5423  .2413       .01
Si5    .9424  .6728  .2632       .01
O1     .2715 -.2715   .089       .02
O2     .4479 -.4479  .1225       .02
O3      .427 -.4270  .0346       .03
O7     .2315  .2846  .0603       .03
O8     .1534 -.1534  .1388       .02
O9    -.3935 -.6065  .2384       .05
O13    .4366  .3654  .0411       .03
O14    .3669  .2881  .1223       .02
O15    .8429 -.8429  .0519       .02
O19    .7218 -.7218  .1691  .30  .06
O20        0      0  .0278  .45  .02
ClX1a      0      0  .7442  .29  .07
OHX1a      0      0  .7442  .21  .07
ClX1b  .0403 -.0403  .7733 .097  .07
OHX1b  .0403 -.0403  .7733  .07  .07