Voltaite
Biagioni C, Mauro D, Pasero M, Bonaccorsi E, Lepore G O, Zaccarini F, Skogby H
American Mineralogist 105 (2020) 1088-1098
Crystal-chemistry of sulfates from the Apuan Alps (Tuscany, Italy).
VI. Tl-bearing alum-(K) and voltaite from the Fornovolasco mining complex
Locality: Fornovolasco mine, Apuan Alps, Italy
_database_code_amcsd 0020897
27.2635 27.2635 27.2635 90 90 90 *Fd3c
.375 .375 .375
atom       x       y       z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
K        .25     .25     .25 .936 .0358  .0358  .0358  .0358  .0106  .0106  .0106
Tl       .25     .25     .25 .064 .0358  .0358  .0358  .0358  .0106  .0106  .0106
Fe1        0       0       0 .982 .0152  .0152  .0152  .0152  .0026  .0026  .0026
Mg1        0       0       0 .018 .0152  .0152  .0152  .0152  .0026  .0026  .0026
Fe2      .25  .10274 -.10274 .746 .0170  .0191  .0160  .0160 -.0005 -.0005 -.0003
Mg2      .25  .10274 -.10274 .254 .0170  .0191  .0160  .0160 -.0005 -.0005 -.0003
Al      .125    .125    .125      .0129  .0129  .0129  .0129   .000   .000   .000
S     .23742  .27552  .11854      .0148  .0158  .0142  .0145  .0000  .0001 -.0002
O1    .24984  .24646  .07377      .0230  .0271  .0237  .0181  .0047 -.0051 -.0038
O2    .22466  .32600  .10409      .0298   .044  .0168  .0289  .0038 -.0038  .0014
O3    .19484  .25393  .14332      .0391   .034   .036   .048 -.0129  .0153 -.0010
O4    .28004  .27514  .15208      .0303   .028   .044  .0193  .0061 -.0031 -.0077
OW5   .18263  .41982  .12142      .0163  .0121  .0281  .0085 -.0048  .0005  .0028
OW6    .0896   .1464   .0703  .25  .030   .026   .036   .028  -.007  -.006   .000
OW7    .0692   .0889   .1041  .25  .030   .026   .036   .028  -.007  -.006   .000
H52     .172    .424   .1530        .08
H53     .167    .433    .094        .08