AM_Muscovite_5 Formula: K Al2.908 Si3.092 O10 H.12 Name: Muscovite Unit cell: 5.189 9.004 20.256 90.0 95.74 90.0 , V=941.65 Space group: C12/C1 (15)

Guggenheim S , Chang Y H , Koster van Groos A F , American Mineralogist , 72 (1987) p.537-550, Muscovite dehydroxylation: High-temperature studies, Sample: T = 650 deg C, from Panasqueira, Portugal