Meionite
Antao S M, Hassan I
American Mineralogist 93 (2008) 1470-1477
Unusual Al-Si ordering in calcic scapolite, Me79.6, with increasing temperature
T = 25 C (HRPXRD)
_database_code_amcsd 0004640
12.16711 12.16711 7.575466 90 90 90 I4/m
atom     x     y     z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
CaM  .3582 .2830     0 .794 .0271  .0172  .0235  .0407  .0057      0      0
NaM  .3582 .2830     0 .206 .0271  .0172  .0235  .0407  .0057      0      0
SiTl .1604 .0920     0  .75 .0138  .0119  .0129  .0165  .0021      0      0
AlTl .1604 .0920     0  .25 .0138  .0119  .0129  .0165  .0021      0      0
SiT2 .1603 .4131 .2068  .54 .0155  .0175  .0150  .0142  .0020  .0000  .0015
AlT2 .1603 .4131 .2068  .46 .0155  .0175  .0150  .0142  .0020  .0000  .0015
CA      .5    .5     0 .834 .0067  .0056  .0056  .0087      0      0      0
SA      .5    .5     0 .146 .0067  .0056  .0056  .0087      0      0      0
O1   .0411 .1505     0      .0180  .0191  .0135  .0215  .0006      0      0
O2   .1857 .3743     0      .0201  .0135  .0185  .0283  .0049      0      0
O3   .4502 .1496 .2068      .0264  .0399  .0174  .0219  .0059  .0064  .0012
O4   .2664 .3665 .6735      .0267  .0239  .0202  .0360  .0028  .0076  .0042
O5S  .3930 .4893 .1276 .073 .1080
O6C  .6010 .5142     0 .625 .1080