AM_Boron_6 Formula: B7 Name: Boron Unit cell: 5.0576 5.6245 6.9884 90.0 90.0 90.0 , V=198.80 Space group: PNNM (58)

Zarechnaya E Y , Dubrovinsky L , Dubrovinskaia N , Filinchuk Y , Chernyshov D , Dmitriev V , Miyajima N , El Goresy A , Braun H F , Van Smaalen S , Kantor I , Kantor A , Prakapenka V , Hanfland M , Mikhaylushkin A S , Abrikosov I A , Simak S I , Physical Review Letters , 102 (2009) p.185501-1185501-4, Superhard semiconducting optically transparent high pressure phase of boron, Note: crystal quenched from 20 GPa, 1700 K, Locality: synthetic