Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
Physical properties of diamond |
-pure carbon -cubic symmetry -perfect octahedral cleavage -10 hardness -high durability - RI 2.42 -great dispersion -pure = colourless |
|
|
diamond conductivity |
therm conductivity - due to covalent bonding that holds carbon atoms together, 3x higher than gold and silver Electrical conductivity - low, paired w high thermal conduc. unusual -diamond itself a conductor |
|
|
Diamind composittion |
- pure C |
|
|
Diamond crystal structure |
-belongs to isometric/cubic crystal system -each of the crystallographic axes = same length at 90 degrees to one another (cube building blocks) -v strong covalently bonded carbon atoms -highly symmetrical 3 dimensional network (therefore durable) |
|
|
diamond cleavage |
-diamond's set of imaginary flat planes within its atomic structure leads to perfect cleavage -planes @ 111 (a plane intersecting each of the 3 orthogonal axes @ an equal unit of 1 away from the origin) |
|
|
importance of diamond cleavage for cutters |
require good understanding of crystallography and inherent weaknesses |
