title: Comment on 'Modelling of surface energies of elemental crystals'.
abstract: Jiang et al (2004 J. Phys.: Condens. Matter 16 521) present a model based on the traditional broken-bond model for predicting surface energies of elemental crystals. It is found that bias errors can be produced in calculating the coordination numbers of surface atoms, especially in the prediction of high-Miller-index surface energies.
authors.affiliation: Centre for Composite Materials, Harbin Institute of Technology, Harbin 150001, People's Republic of China.
authors.forename: Jinping
authors.initials: J
authors.lastname: Li
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Luo
authors.forename: Ping
authors.initials: P
authors.lastname: Hu
authors.forename: Shanliang
authors.initials: S
authors.lastname: Dong