Umbrianite
Sharygin V V, Pekov I V, Zubkova N V, Khomyakov A P, Stoppa F, Pushcharovsky D Y
European Journal of Mineralogy 25 (2013) 655-669
Umbrianite, K7Na2Ca2[Al3Si10O29]F2Cl2, a new mineral species from melilitolite
of the Pian di Celle volcano, Umbria, Italy
Locality: Pian di Celle volcano, Umbria, Italy
_database_code_amcsd 0020030
7.0618 38.420 6.5734 90 90 90 *Pmmn
.25 .25 0
atom       x      y       z occ  Uiso
K(1)     .25 .33849   .1112     .0617
K(2)     .25    .25  -.2775 .80 .0351
Na(2)    .25    .25  -.2775 .08 .0351
K(3)     .25 .41285  -.2824 .90 .0353
Na(3)    .25 .41285  -.2824 .06 .0353
K(4)     .25  .6602   .5198 .45  .035
K(4')  .1570  .6603    .523 .25  .049
Na        .0     .5      .5 .70 .0232
Ca        .0     .5      .5 .30 .0232
Si(1)    .25    .75   .3961  .5 .0144
Al(1)    .25    .75   .3961  .5 .0144
Si(2)    .25 .70109   .0231     .0234
Si(3)    .25 .56856  -.5795     .0155
Si(4) -.0330 .57166  -.2193     .0114
Si(5) -.0157    .75   .7805 .55 .0283
Al(5) -.0157    .75   .7805 .30 .0283
Fe(5) -.0157    .75   .7805 .15 .0283
Al       .25 .61619   .0332     .0165
Ca       .25 .50431  -.9977 .95 .0111
Mg       .25 .50431  -.9977 .05 .0111
O(1)   .0631  .7146   .9075      .078
O(2)   .0512  .6023  -.0887      .066
O(3)     .25  .5317  -.6820      .028
O(4)     .25  .6021  -.7239      .046
O(5)  -.0169 .53449  -.1226      .049
O(6)     .25  .6595   .0332      .070
O(7)   .0582    .75   .5386      .051
O(8)     .75    .75    .797      .116
O(9)   .0633  .5726  -.4375      .053
O(10)    .25  .7153   .2564      .044
O(11)    .75  .5826  -.2625      .036
F        .25 .47937  -.3176     .0247
Cl       .75 .66536   .3855 .95  .099
F        .75 .66536   .3855 .05  .099