AM_Arsenic_2 Formula: As Name: Arsenic Unit cell: 3.7595 3.7595 10.4573 90.0 90.0 120.0 , V=128.00 Space group: R3M (160)

Schiferl D , Barrett CS , Journal of Applied Crystallography , 2 (1969) p.30-36, The crystal structure of arsenic at 4.2, 78 and 299 K, Sample: T = 78 K