AM_Boron_5 Formula: B7 Name: Boron Unit cell: 5.054 5.62 6.987 90.0 90.0 90.0 , V=198.46 Space group: PNNM (58)

Oganov A R , Chen J , Gatti C , Ma Y , Ma Y , Glass C W , Liu Z , Yu T , Kurakevych O O , Solozhenko V L , Nature , 457 (2009) p.863-867, Ionic high-pressure form of elemental boron, Note: theoretical calculation