Abstract
An expression is derived for the fracture energy, γ, in brittle crystals, namely, γ = kd 0 E, d 0 being the lattice spacing, E Young’s modulus perpendicular to the fracture plane, and k is a constant. The value of γ obtained through this expression is compared to experimental data for cubic crystals. Despite the fit, we conclude that because the fracture energy is dominated by the elastic constant, comparisons between a computed γ and experimental data cannot be used to distinguish between bonding functions.
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