AM_Nanpingite Formula: Cs.88 K.06 Rb.01 Al2.34 Mg.2 Fe.16 Li.14 Si3.16 O11.8 (F.2 H1.8) Name: Nanpingite Unit cell: 9.076 5.226 21.41 90.0 99.48 90.0 , V=1001.63 Space group: C12/C1 (15)

Ni Y , Hughes J M , American Mineralogist , 81 (1996) p.105-110, The crystal structure of nanpingite-2M2, the Cs end-member of muscovite