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 0014509
10.118 10.118 14.300 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 .90 2.04 .006577 .006577 .002567 .003289        0        0
NaC         0      0    .25 .10 2.04 .006577 .006577 .002567 .003289        0        0
NaB       1/3    2/3      0 .05  1.2
MgA       1/3    2/3    .25 .83 1.82 .005633 .005633 .002445 .002833        0        0
Fe3+A     1/3    2/3    .25 .17 1.82 .005633 .005633 .002445 .002833        0        0
MgT2       .5     .5    .25 .83 0.86 .001954 .004949 .000941 .002475        0        0
Fe3+T2     .5     .5    .25 .17 0.86 .001954 .004949 .000941 .002475        0        0
SiT1   .23840 .35292 .39072     0.92 .003061 .003451 .001027 .001823  .000100  .000100
O1      .1298  .3948      0     1.76 .007489 .006838 .001235 .003582        0        0
O2      .2195  .2776  .1332     1.58 .005014 .006089 .001993 .003484  .000020 -.000120
O3      .1545  .4964  .1725     1.25 .003875 .004298 .001492 .001986 -.000200 -.000359