Supercubane Fayos J Journal of Solid State Chemistry 148 (1999) 278-285 Possible 3D carbon structures as progressive intermediates in graphite to diamond phase transition Note: mathematical model, phase: supercubane _database_code_amcsd 0013989 4.28 4.28 4.28 90 90 90 Im3 atom x y z C .1666 .1666 .1666