Group_14_Notes

Group_14_Notes - Eight allotropes of carbon: a) Diamond, b)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Eight allotropes of carbon : a) Diamond , b) Graphite , c) Lonsdaleite , d) C 60 ( Buckminsterfullerene or buckyball ), e) C 540 , f) C 70 , g) Amorphous carbon , and h) single-walled carbon nanotube or buckytube . Lonsdaleite or hexagonal diamond is an allotrope of carbon with a hexagonal lattice, believed to form when meteoric graphite falls to Earth . The great heat and stress of the impact transforms the graphite into diamond, but retains graphite's hexagonal crystal lattice . Spaceship Earth at Epcot , Walt Disney World is one of the most famous large-scale geodesic spheres. What is glassy (vitreous) carbon? made by thermal decomposition of a three-dimensionally crosslinked organic polymer (e.g., sucrose, cellulose) discovered 1960s a form of carbon with ceramic properties: high flexural strength (260 Mpa) high temperature resistance (does not convert to graphite even at 3000 °C) extreme resistance to chemical attack (no reaction with conc. H 2 SO 4 or HNO 3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/06/2008 for the course CHEM 173B taught by Professor Scott during the Winter '08 term at UCSB.

Page1 / 5

Group_14_Notes - Eight allotropes of carbon: a) Diamond, b)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online