Glauconite
Drits V A, Zviagina B B, McCarty D K, Salyn A L
American Mineralogist 95 (2010) 348-361
Factors responsible for crystal-chemical variations in the solid solutions
from illite to aluminoceladonite and from glauconite to celadonite
Locality: Ordovician sandstone, Latvia
Sample Name: PILT
_database_code_amcsd 0005027
5.246 9.076 10.184 90 101.1 90 C2/m
atom     x     y     z
K        0    .5    .5
Al      .5 .1667     0
Si   .4219 .3314 .2729
O1   .3602 .3216 .1113
O2   .4639    .5 .3276
O3   .6899 .2448 .3351
OH   .4122     0 .1091