Muscovite-2M1

Al_2.14Ca_0.13Cr_0.16Fe_0.08H_1.9K_0.69Mg_0.54Na_0.06O_11.9Si_3.08

Martin-Ramos JDRodriguez-Gallego M

Mineralogical Magazine (1982) 46, 269-272

a=5.2116Å   b=9.045Å   c=19.97Å

α=90°   β=95.7°   γ=90°