Members of the U.S. Army's Special Operations Forces--the Green Berets, the Rangers, and Delta Force--appear to have been deployed to the Middle East.
Graphite is a dark gray to black, very soft, shiny metallic mineral with a distinctive greasy feeling. One of the Earthâs softest minerals, graphite will easily leave marks on paper, which is why it is used for fine artist pencils. Even modern pencil âleadâ is composed of graphite mixed with clay.
Atomic structure of graphite. atom cube image by Sergey Tokarev from Fotolia.com. It is interesting to note that graphite is used as lead in pencils for writing purposes and as a good lubricant in heavy and light bearings -- in its dry form as well as after mixing it with grease and oil.ue to this weak bonding between the atoms in the overlapping sheets, there is a tendency for the sheets to easily slide over each other, which causes slipperiness. It is due to this slipperiness effect that graphite acts as a good lubricant.