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| Property | Reference | |
| Formula | C | |
| Unit Cell | a=2.4612 Ang. c=6.7079 Ang. | |
| Crystal Class | 6/m 2/m 2/m | |
| Space Group | P6_3/mmc | |
| Formula Units per Unit Cell | 4 | |
| Bonding | trigonal planar (sp^2) with -C-C- 1.412 Ang. | |
| JCPDS | 25-284 for 2H (26-1079 for 3R) | |
| Polymorphs | Diamond, Chaoite, Graphite 3R | |
| Conductivity: | ||
| Electrical Resistivity (ohm.m) perpendicular to c-axis parallel to c-axis natural | 9.8x10^-6 4.1x10^-5 1.2x10^-6 | (Powell & Childs 1972) |
| Thermal (Watts/meter.kelvin at 273K) perpendicular to c-axis parallel to c-axis natural | 250 80 160 | (Powell & Childs 1972) |
| Thermal: | ||
| Linear Thermal Expansion Coeff. alpha in units 10^-6 K^-1 overall: a-axis: c-axis: | 7.8 (at 293K); 8.9 (at 500K) -1.2 (at 293K); -0.7 (at 500K) 25.9 (at 293K); 28.2 (at 500K) | (Kirby et al., 1972) |
| Optical: | ||
| Bireflectance and reflection pleochroism | o-vibration: higer reflectance and yellow or brownish tint e-vibration: bluish-grey tint | (Peckett 1992) |
| Mechanical: | ||
| Bulk Modulus (single xtl) | 34 GPa | Kelly (1981) Bridgeman (1945) |
| Bulk Modulus (polycrystal) | 7.3-10.7 GPa (non-irradiated, uncoated) 2.5-7.3 GPa (non-irradiated, coated) 14.0-16.9 GPa(irradiated, uncoated) 7.8-8.4 GPa (irradiated, coated) | Boey & Bacon (1986) |
| Mohs Hardness | 1-2 | |
| Specific Gravity | 2.2 | |
| Magnetic: | ||
| Magnetic Susceptibility (pyrolitic) (pyrolitic) (rod) | strongly diamagnetic -450x10^-6 perpendicular to c-axis -85x10^-6 parallel to c-axis -160x10^-6 | Simon & Geim (2000) |