Carbon Ownby P D, Yang X, Liu J Journal of the American Ceramic Society 75 (1992) 1876-1883 Calculated X-ray diffraction data for diamond polytypes Note: cubic, 3C structure Note: theoretically calculated structure values _database_code_amcsd 0014065 3.5667 3.5667 3.5667 90 90 90 Fd3m atom x y z C .5 .5 .5