Rancieite
Ertl A, Pertlik F, Prem M, Post J E, Kim S J, Brandstatter F, Schuster R
European Journal of Mineralogy 17 (2005) 163-172
Rancieite crystals from Friesach, Carinthia, Austria
Note: Birnessite group
Locality: Friesach, Carinthia, Austria
_database_code_amcsd 0007090
2.845 2.845 7.485 90 90 120 P-3
atom   x   y    z occ Biso
Ca    .5   0   .5 .53 1.40
Mn4+   0   0    0 1/6 1.40
O1   1/3 2/3 .140 1/3 1.40
O2     0   0   .5 .32 1.40
O3   2/3 1/3 .380 .60 1.40