AM_Mica_1 Formula: Ca Li.5 Al3.68 Si1.74 Be.58 O12 H2 Name: Mica Unit cell: 5.058 8.763 19.111 90.0 95.39 90.0 , V=843.32 Space group: C1C1 (9)

Lin J C , Guggenheim S , American Mineralogist , 68 (1983) p.130-142, The crystal structure of a Li,Be-rich brittle mica: a dioctahedral-trioctahedral, intermediate