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 0014511
10.122 10.122 14.320 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 .93 1.84 .005271 .005271 .002767 .002635        0        0
NaC         0      0    .25 .07 1.84 .005271 .005271 .002767 .002635        0        0
NaB       1/3    2/3      0 .12  2.0
MgA       1/3    2/3    .25 .86 1.26 .004099 .003969 .001987 .002733        0        0
Fe3+A     1/3    2/3    .25 .14 1.26 .004099 .003969 .001987 .002733        0        0
MgT2       .5     .5    .25 .86 1.09 .002277 .005433 .001487 .002733        0        0
Fe3+T2     .5     .5    .25 .14 1.09 .002277 .005433 .001487 .002733        0        0
SiT1   .23828 .35296 .39076     1.07 .003091 .003481 .001524 .001789  .000060  .000119
O1      .1297  .3938      0     1.85 .007190 .006897 .001524 .003579        0        0
O2      .2194  .2777  .1334     1.74 .005466 .006637 .002365 .004132  .000000  .000060
O3      .1549  .4965 .17246     1.38 .003969 .004360 .001914 .002082 -.000179 -.000339