Ikranite
Rastsvetaeva R K, Chukanov N V
Crystallography Reports 48 (2003) 717-720
Ikranite: composition and structure of a new mineral of the eudialyte group
Locality: Mount Karnasurt, Lovozero alkaline massif, Kola Peninsula, Russia
_database_code_amcsd 0012386
14.167 14.167 30.081 90 90 120 R3m
atom        x     y      z  occ Biso
Zr      .3332 .1666  .1669      1.86
Si1     .0832 .5416  .2573       2.1
Si2     .1406 .0703  .0804       2.0
Si3     .0550 .3249  .2366       1.5
Si4     .2056 .4112  .0788       2.7
Si5     .5266 .2633  .2538       1.7
Si6    -.0073 .6052  .0971       1.6
O1      .0218 .5109  .3017       3.9
O2      .4127 .3092  .1278       2.3
O3      .4021 .0342  .0451       4.1
O4      .0359 .2993  .2881       4.0
O5      .0939 .3738  .1073       2.7
O6      .3912 .4377  .2260       2.5
O7      .2584 .0284  .2053       3.1
O8      .4452 .2226  .2938       5.8
O9      .1765 .3530  .2202       2.5
O10     .1912 .0956  .1259       3.2
O11     .1808 .3616  .0284       3.6
O12     .6060 .3940  .2537       3.1
O13     .2208 .1104  .0389       4.0
O14     .3951 .6049  .2540       4.8
O15     .0185 .5092  .1046       4.0
O16     .0617 .1234  .0740       2.5
O17     .2725 .5450  .0709       5.0
O18     .4692 .2346  .2045       3.4
CaM1    .2626 .0012  .0004 .550 2.21
MnM1    .2626 .0012  .0004 .233 2.21
CeM1    .2626 .0012  .0004 .055 2.21
LaM1    .2626 .0012  .0004 .022 2.21
NdM1    .2626 .0012  .0004 .006 2.21
NaM1    .2626 .0012  .0004 .075 2.21
SrM1    .2626 .0012  .0004 .059 2.21
Fe3+M2a .4907 .5094  .0016  .70  4.6
NaM2b   .5324 .4676  -.003  .30  9.3
ZrM3a     1/3   2/3  .0306 .086  1.9
NbM3a     1/3   2/3  .0306 .032  1.9
TiM3a     1/3   2/3  .0306 .032  1.9
SiM3b     1/3   2/3  .0859  .30  1.7
ZrM4a     1/3   2/3  .2271  .15  2.2
ZrM4b     1/3   2/3  .2875 .164  2.8
NbM4b     1/3   2/3  .2875 .068  2.8
TiM4b     1/3   2/3  .2875 .068  2.8
NaA1a   .1110 .2220  .1528 .494  2.2
H3OA1a  .1110 .2220  .1528 .166  2.2
H3OA1b  .0808 .1616  .1663  .34    3
NaA2a   .5681 .4319  .1730  .70  1.3
NaA2b   .5450 .4550  .1789  .30  2.6
NaA3a   .4648 .2324  .0484 .615  1.4
H3OA3a  .4648 .2324  .0484 .205  1.4
H30A3b   .492  .246   .035  .18  1.2
NaA4a   .2359 .4718 -.0459  .65  2.5
KA4a    .2359 .4718 -.0459   .1  2.5
SrA4a   .2359 .4718 -.0459  .05  2.5
H3OA4b   .266  .533  -.054  .20  1.9
H3OA5a   .391  .609   .159 .073    4
OHA5a    .391  .609   .159 .157    4
H3OA5b   .185  .593   .164  .45    4
Cl        1/3   2/3   .150  .74  5.3
OH1       1/3   2/3   .137  .30    7
OH2      .391  .609   .159  .23    4
OH3      .259  .518  .3307  .70  6.5
OH4      .420  .580  -.001  .70  7.1
Wat1a       0     0  .2250   .7  1.5
Wat1b       0     0   .199   .3  1.4
Wat2      2/3   1/3  .0999       2.5