AM_Palygorskite_1
Formula: Al2.2 Mg2.14 Si7.8 O30 H22
Name: Palygorskite
Unit cell: 13.2858 17.8476 5.2419 90.0 107.56 90.0 , V=1185.04
Space group: C12/M1 (12)

Post J E , Heaney P J , American Mineralogist , 93 (2008) p.667-675, Synchotron powder X-ray diffraction study of the structure and dehydration, behavior of palygorskite, Locality: Yulu River, Korea, Sample: T = 300 K