Pyracmonite
Demartin F, Gramaccioli C M, Campostrini I
The Canadian Mineralogist 48 (2010) 307-313
Pyracmonite, (NH4)3Fe(SO4)3, a new ammonium iron sulfate
from La Fossa crater, Vulcano, Aeolian Islands, Italy
Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy
_database_code_amcsd 0006332
15.2171 15.2171 8.9323 90 90 120 R3c
atom      x      y      z  occ   Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
N    .07773 .30174 .24189 .867  .0322  .0315  .0324  .0330  .0163 -.0011  .0048
K    .07773 .30174 .24189 .133  .0322  .0315  .0324  .0330  .0163 -.0011  .0048
H1     .031   .307   .264 .867   .059
H2     .113   .342   .169 .867   .047
H3     .066   .244   .207 .867   .077
H4     .112   .332   .323 .867   .091
Fe        0      0 .13800 .893 .01631 .01909 .01909  .0107 .00954      0      0
Al        0      0 .13800 .107 .01631 .01909 .01909  .0107 .00954      0      0
S    .16913 .14291 .38360      .02027 .01528 .02044  .0189 .00431  .0006 -.0021
O1    .1198  .0934  .5215       .0585  .0390  .0803  .0184  .0013  .0043  .0180
O2   .09084 .11849  .2668       .0299  .0384  .0252  .0216  .0126 -.0095 -.0034
O3    .2218  .2516  .4072       .0693  .0732  .0238  .0685 -.0075 -.0324  -.016
O4    .2384  .1128  .3339       .0730  .0513  .1238  .0721  .0650 -.0266 -.0514