AM_Realgar_4 Formula: As S Name: Realgar Unit cell: 9.385 13.57 6.6 90.0 105.36 90.0 , V=810.52 Space group: P121/N1 (14)

Kyono A , Kimata M , Hatta T , American Mineralogist , 90 (2005) p.1563-1570, Light-induced degradation dynamics in realgar: in situ structural investigation, using single crystal X-ray diffraction and X-ray photoelectron spectroscopy