Roedderite
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 0014510
10.124 10.124 14.305 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 .89 2.10 .006439 .006439 .002859 .003220        0        0
NaC         0      0    .25 .11 2.10 .006439 .006439 .002859 .003220        0        0
NaB       1/3    2/3 -.0202 .11  1.7
MgA       1/3    2/3    .25 .87 1.03 .003090 .003090 .001442 .001561        0        0
Fe3+A     1/3    2/3    .25 .13 1.03 .003090 .003090 .001442 .001561        0        0
MgT2       .5     .5    .25 .87 1.10 .002537 .005594 .001368 .002797        0        0
Fe3+T2     .5     .5    .25 .13 1.10 .002537 .005594 .001368 .002797        0        0
SiT1   .23814 .35274 .39066     0.99 .003057 .003317 .001332 .001724  .000080  .000120
O1      .1299  .3945      0     1.91 .007643 .006277 .001674 .003317        0        0
O2      .2193  .2776 .13327     1.73 .005431 .006374 .002382 .003935 -.000080  .000040
O3      .1550  .4966 .17245     1.34 .004000 .004358 .001771 .002081 -.000159 -.000379