Graphite, Carbon, C

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Graphite, Carbon, C
Categories:	Carbon; Graphite; Pure Element
Material Notes:	CAS Number: 7440-44-0 Physical Form: Soft Black Hexagonal Crystals Natural Occurrence: Metamorphic rocks: marble, slate, schist. Weathering end product: flaky residue in soils. Virtually all commercially available graphite is artificially produced under controlled conditions.
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Physical Properties	Metric	English	Comments

Density	2.25 g/cc	0.0813 lb/in³
Specific Surface Area	1.0 m²/g	1.0 m²/g	Cloth

Chemical Properties	Metric	English	Comments
Atomic Mass	12.0107	12.0107	1995
Atomic Number	6	6
X-ray Absorption Edge	43.648 Å	43.648 Å	K
Critical Pressure	103 bar	77500 torr
Critical Temperature	4492 °C	8118 °F
Electronegativity	2.55	2.55	Pauling
Ionic Radius	0.160 Å	0.160 Å	Crystal Ionic Radius for Valence +4
	2.60 Å	2.60 Å	Crystal Ionic Radius for Valence -4

Mechanical Properties	Metric	English	Comments
Hardness, Mohs	1.0 - 2.0	1.0 - 2.0
Tensile Modulus	4.80 GPa	696 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00600 ohm-cm	0.00600 ohm-cm

Thermal Properties	Metric	English	Comments
Heat of Fusion	9741 J/g	4191 BTU/lb
CTE, linear	0.600 - 4.30 µm/m-°C @Temperature 20.0 °C	0.333 - 2.39 µin/in-°F @Temperature 68.0 °F
Specific Heat Capacity	0.7077 J/g-°C	0.1691 BTU/lb-°F	Crystal
	1.732 J/g-°C	0.4140 BTU/lb-°F	Gas
Thermal Conductivity	24.0 W/m-K	167 BTU-in/hr-ft²-°F
Sublimation Temperature	3650 °C	6600 °F
Maximum Service Temperature, Inert	<= 3650 °C	<= 6600 °F	Sublimation temperature. Graphite cloth is stable in vacuum and inert atmospheres approaching this temperature.
Heat of Formation	0.000 kJ/mol	0.000 kJ/mol	Crystal
	716.7 kJ/mol	716.7 kJ/mol	Gas

Optical Properties	Metric	English	Comments
Emissivity (0-1)	0.90	0.90

Component Elements Properties	Metric	English	Comments
Carbon, C	100 %	100 %

Descriptive Properties
Color	Black

References for this datasheet.

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