Chapmanite
Ballirano P, Maras A, Marchetti F, Merlino S, Perchiazzi N
Powder Diffraction 13 (1998) 44-49
Rietveld refinement of chapmanite SbFe2Si2O8OH,
a TO dioctahderal kaolinite-like mineral
Locality: Tafone mine, Tucsany, Italy
_database_code_amcsd 0015317
5.225 8.997 7.780 90 101.71 90 Cm
atom    x     y     z Biso
Sb   .423    .5  .742    3
Fe   .505 .1681 .0053    3
Si   .298  .167  .361    3
O1   .297 .3337 -.127    3
O2   .296     0 -.130    3
O3   .223 .1705 .1469    3
OH   .692     0  .145    3
O4   .073  .251  .441    3
O5   .326     0  .439    3