Quadridavyne
Bonaccorsi E, Merlino S, Orlandi P, Pasero M, Vezzalini G
European Journal of Mineralogy 6 (1994) 481-487
Quadridavyne, [(Na,K)6Cl2][Ca2Cl2][Si6Al6O24], a new feldspathoid
mineral from Vesuvius area
Note: Cl1 y-coordinate altered
Locality: Vesuvius, Italy
_database_code_amcsd 0006545
25.771 25.771 5.371 90 90 120 P6_3/m
atom          x     y    z  occ
Naint(ab)  .052  .106  1/4  .28
Kint(ab)   .052  .106  1/4  .10
Namid(ab)  .068  .139  1/4  .24
Kmid(ab)   .068  .139  1/4  .12
Naext(ab)  .091  .182  1/4  .20
Kext(ab)   .091  .182  1/4  .06
Naint(c1)  .391  .439  1/4
Naint(c2)  .587  .414  1/4
Kext(c)    .591  .683  1/4
Si1       .1615 .2049  3/4
Si2       .2921 .4597  3/4
Si3        .041  .335  3/4
Si4       .2082 .5408  1/4
Al1       .0345 .2082  3/4
Al2        .299  .333  3/4
Al3        .168  .464  3/4
Al4        .209 .6692  1/4
O1         .105  .215  3/4
O2         .060 .2844  3/4
O3         .172  .002  .02
O5         .294  .399  3/4
O6         .211  .273  3/4
O7         .667 -.005 .021
O8         .669  .506 .508
O9         .106  .398  3/4
O10        .223  .445  3/4
O11        .174  .511 .993
O13        .220  .608  1/4
O14        .276  .553  1/4
Ca1         2/3   1/3  3/4
Cl1         2/3   1/3  1/4
Ca2        .334  .169  1/4
Cl2       .3130 .1561  3/4
Cl(a)     -.018  .024  1/4  1/6
Cl(b)      .029  .047  1/4  1/6
Cl(c)      .529  .547  1/4