Chayesite
Alietti E, Brigatti M F, Capedri S, Poppi L
Mineralogical Magazine 58 (1994) 655-662
The roedderite-chayesite series from Spanish lamproites:
crystal chemical characterization
Locality: Cancarix, Albacete province, Spain
_database_code_amcsd 0014512
10.128 10.128 14.312 90 90 120 P6/mcc
atom        x      y      z occ Biso  B(1,1)  B(2,2)  B(3,3)  B(1,2)   B(1,3)   B(2,3)
KC          0      0    .25 .85 1.76 .005199 .005199 .002526 .002600        0        0
NaC         0      0    .25 .15 1.76 .005199 .005199 .002526 .002600        0        0
NaB       1/3    2/3      0 .07   .8
MgA       1/3    2/3    .25 .84  .89 .002307 .002307 .001513 .001170        0        0
Fe3+A     1/3    2/3    .25 .16  .89 .002307 .002307 .001513 .001170        0        0
MgT2       .5     .5    .25 .84  .89 .001722 .004679 .001221 .002340        0        0
Fe3+T2     .5     .5    .25 .16  .89 .001722 .004679 .001221 .002340        0        0
SiT1   .23803 .35318 .39069      .78 .002145 .002437 .001208 .001300  .000119  .000159
O1      .1304  .3947      0     1.63 .006337 .005037 .001697 .002827        0        0
O2      .2198  .2781 .13350     1.49 .004419 .005459 .002221 .003412  .000000 -.000020
O3      .1553  .4971 .17254     1.07 .002925 .003087 .001623 .001462 -.000239 -.000478