Graphite is a naturally occurring crystalline form of the element carbon (chemical formula: C). It is characterized by its hexagonal layered lattice structure, where carbon atoms are arranged in sheets (graphene) that are weakly bonded together. This unique structure makes graphite one of the softest known minerals, yet it is also highly resistant to heat and a good conductor of electricity.
Core Properties
Physical Appearance: Typically steel-gray to black with a metallic luster and a greasy, slippery feel.
Hardness: Extremely soft, ranking between 1 and 2 on the Mohs hardness scale.
Conductivity: High thermal and electrical conductivity, a rare trait for a non-metallic mineral.
Stability: The most stable form of carbon under standard conditions; it can withstand temperatures exceeding 3,600°C without melting, instead undergoing sublimation directly into gas.
Key Types
Natural Graphite: Found in metamorphic rocks like marble and schist; it occurs in three varieties: flake (high purity, used in batteries), amorphous (microcrystalline, used in brake linings), and vein/lump (rare and extremely pure).
Synthetic Graphite: Man-made from petroleum coke or coal-tar pitch at temperatures approaching 3,000°C. It is often purer and more consistent than natural graphite, making it ideal for high-tech applications like nuclear reactors and advanced electrodes.
Primary Applications
Energy Storage: Graphite is the predominant material for anodes in lithium-ion batteries, crucial for electric vehicles (EVs).
Industrial Manufacturing: Used as a dry lubricant, in fire-resistant "refractory" linings for furnaces, and as electrodes in steelmaking.
Everyday Products: Historically known as "black lead," it is the primary component of pencil "leads" (mixed with clay).
High-Tech & Specialty: Used in nuclear moderators, fuel cells, and high-strength, lightweight sports equipment like golf clubs and bicycle frames.
Market Context (2026)
As of 2026, global demand for graphite continues to surge due to the expansion of the EV battery market. China remains the dominant global producer of both natural and synthetic graphite, supplying roughly 67-75% of the world's output. In response to supply chain concerns, countries like the U.S. and Canada are actively developing domestic projects, such as the Graphite Creek deposit in Alaska
