Register to reply

Crystal lattice and unit cell

by asdf1
Tags: cell, crystal, lattice, unit
Share this thread:
asdf1
#1
Feb16-06, 09:55 AM
P: 736
what's the difference between those two?
Phys.Org News Partner Science news on Phys.org
Pilot sites in energy from coffee waste show good results
Startups offer banking for smartphone users
Factor in naked mole rat's cells enhances protein integrity
assyrian_77
#2
Feb16-06, 11:03 AM
P: 116
A lattice is a (idealized) structure of crystals where each lattice point represent an identical group of atoms. A group is sometimes called a basis. One can form basis vectors with which all lattice point positions can be expressed. The unit cell (I guess you mean the primitive cell) is the volume defined by the set of basis vectors. This is the smallest volume; there are no cells with smaller volumes.

Hopefully this was of help. If not, don't hesitate to ask.
Gokul43201
#3
Feb16-06, 12:01 PM
Emeritus
Sci Advisor
PF Gold
Gokul43201's Avatar
P: 11,155
Quote Quote by asdf1
what's the difference between those two?
What does your textbook or class notes say ?

asdf1
#4
Feb17-06, 08:26 AM
P: 736
Crystal lattice and unit cell

my textbook says:
unit cell: crystal structure that's the smallest group of atoms possessing
the symmetry of the crystal
lattice: orderly array of points in space

so does that mean that the unit cell is part of the lattice?
Gokul43201
#5
Feb17-06, 02:26 PM
Emeritus
Sci Advisor
PF Gold
Gokul43201's Avatar
P: 11,155
Quote Quote by asdf1
so does that mean that the unit cell is part of the lattice?
Yes, it is the smallest "representative" part.
asdf1
#6
Feb17-06, 08:56 PM
P: 736
ok, thanks!!!


Register to reply

Related Discussions
About quasiperiodic crystal lattice Atomic, Solid State, Comp. Physics 0
Crystal Lattice/crystaline structure Atomic, Solid State, Comp. Physics 2
Difference between Bravais lattice and unit cell? Engineering, Comp Sci, & Technology Homework 0
Electrical Analogue Simulating a crystal Lattice Atomic, Solid State, Comp. Physics 3
Crystal Lattice Structures Computing & Technology 1