Pyromorphite
Mills S J, Ferraris G, Kampf A R, Favreau G
American Mineralogist 97 (2012) 415-418
Twinning in pyromorphite: The first documented occurrence of
twinning by merohedry in the apatite supergroup
Locality: Puech de Compolibat, Combret, Aveyron
_database_code_amcsd 0020825
10.0017 10.0017 7.3413 90 90 120 P6_3/m
atom      x      y       z  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Pb1     1/3   -1/3 -.00478 .0247  .0263  .0263  .0215 .01314      0      0
Pb2  .25475 .00601    -.25 .0244  .0176  .0209  .0344  .0093      0      0
P     .4104 -.6215    -.25 .0156  .0125  .0163  .0176  .0069      0      0
O1   -.1437 -.6554     .25  .028   .017   .033   .024   .006      0      0
O2    .5248  .1154    -.25  .022   .018   .015   .024   .002      0      0
O3    .3616 -.7250  -.0802 .0286   .031   .032   .029   .020   .013   .012
Cl        0      0      .5 .0236  .0204  .0204   .030  .0102      0      0