Asisite
Welch M D
Mineralogical Magazine 68 (2004) 247-254
Pb-Si ordering in sheet-oxychloride minerals: the super-structure of asisite,
nominally Pb7SiO8Cl2
Locality: Kombat mine, Namibia
_database_code_amcsd 0014572
3.8932 3.8932 22.803 90 90 90 I4/mmm
atom x  y     z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Pb1  0  0 .0838     .017  .022   .022   .007       0      0      0
Pb2  0  0 .3049 .75 .018  .031   .031   .014       0      0      0
Si2  0  0 .3049 .25 .018  .031   .031   .014       0      0      0
O    0 .5  .143     .059  .062   .058   .056       0      0      0
Cl   0  0    .5     .043  .034   .034   .060       0      0      0