Regarding graphite the following information are available:
Let c – c bond distance in graphite is dA
∴Surfacearea=6×√34×d2=6×√34×d2×10−16cm2
∴vol.oftheunitcell=6×√34×d2×10−16×3.35×10−8cm3
∴massoftheunitcell=6×√34×d2×2.25×10−24gm
∴6×√34×3.35×2.25×10−24×d2=12×106×10−24×2
∴d2=103×41×2√3×3.35×2.25=2.04265
Or d = 1.429 A