|In situ availability:||trace|
|density:||(graphite) 2.267 g/cm3(diamond) 3.513 g/cm3|
|N/A ← N/A → N/A|
|B ← C → N|
|Al ← Si → P|
|Atomic radius (pm):||70|
|Bohr radius (pm):||67|
|Covalent radius (pm):||77|
|Van der Waals radius (pm):||170|
|ionic radius (pm):||(+4) 16|
|1st ion potential (eV):||11.26|
|Electrons Per Shell|
|Oxidation states:||4, 2|
Carbon is a Non-metal in group 14. It has a Hexagonal crystalline structure. This element has two stable isotopes: 12 and 13.
Application to Lunar Colonization
Carbon would be required for the production of lunar steel. In addition, use of carbon has been proposed for a number of lunar industrial procedures, both as a reactant and as an electrode material. Examples include aluminum and titanium production.
Lunar Occurrence and Production
Carbon is present in the lunar regolith. Estimates of its concentration range from 80 to over 200 parts per million, depending on location. This carbon could be extracted by heating the regolith, causing carbon monoxide (CO), carbon dioxide (CO2), and methane (CH4) to form, which are then collected (see Volatiles). These substances would have to be reduced further to produce elemental carbon.