| Grahamite | |
|---|---|
| General | |
| Category | Organic mineral |
| Crystal system | Amorphous |
| Identification | |
| Color | Black |
| References | 12 |
Grahamite, also known as Pyrobitumen or Anthraxolite,1 is a bitumen-impregnated rock (asphaltite). It is a naturally occurring solid hydrocarbon bitumen with a relatively high fixed carbon rate of 35–55% and high temperature of fusion.3 It occurs in Cuba, Mexico, and in West Virginia and Oklahoma, United States. Grahamite found in the Impson Valley of southeastern Oklahoma is known as impsonite.
Grahamite was named by Henry Wurtz after James Lorimer Graham, who was interested in commercial development of this mineral in West Virginia.4
References
References
- Mindat with location data
- Mineralienatlas
- Speight, James G. (2014). The Chemistry and Technology of Petroleum (5 ed.). CRC Press. p. 19. ISBN 9781439873892.
- Richardson, Clifford (1910). "Grahamite, a solid native bitumen" (PDF). Journal of the American Chemical Society. 32 (9): 1032–1049. doi:10.1021/ja01927a003.