Trying to calculate the density of LiNbO3 from perovskite

  • Thread starter Thread starter Frankenstein19
  • Start date Start date
  • Tags Tags
    Density
Click For Summary
SUMMARY

The discussion centers on calculating the theoretical density of Lithium Niobate (LiNbO3) using the formula for crystalline solids. The correct theoretical density is established as 4.644 g/cm³, while the initial calculation yielded 3.85 g/cm³ due to an incorrect count of LiNbO3 units in the unit cell. Participants emphasized the importance of accounting for the different atomic weights of the three types of atoms present in the compound.

PREREQUISITES
  • Understanding of crystalline solid density calculations
  • Familiarity with the composition of Lithium Niobate (LiNbO3)
  • Knowledge of atomic weights and their significance in density calculations
  • Proficiency in applying theoretical density formulas
NEXT STEPS
  • Review the theoretical density formula for crystalline solids
  • Study the atomic structure and composition of Lithium Niobate (LiNbO3)
  • Learn about the significance of atomic weights in density calculations
  • Explore common errors in calculating densities of crystalline materials
USEFUL FOR

Students in materials science, chemists, and anyone involved in solid-state physics or crystallography who seeks to understand the properties of Lithium Niobate and similar compounds.

Frankenstein19
Messages
56
Reaction score
0

Homework Statement


upload_2017-3-6_17-49-48.png

This is what I have so far. I'm using the theoretical density formula for crystaline solids
big_thumb.jpg

but the actual theoretical density is supposed to be 4.644g/cm^3

Am I missing something? I'm using the right formula, am I not?
 

Attachments

  • upload_2017-3-6_17-49-0.png
    upload_2017-3-6_17-49-0.png
    2.7 KB · Views: 988
Physics news on Phys.org
First, from your formula I get 3.85 g/cm3, not 3.5. And there are not 5 "LiNbO3" units in the unit cell. Count them again.
 
you have three different types of atoms each one has different atomic weight.
 

Similar threads

How to Calculate Atomic Density for Borated Water (750 ppm) at 300 K?
  • · Replies 16 ·
Replies
16
Views
3K
Amount of salt needed to achieve a specific density of soln?
  • · Replies 22 ·
Replies
22
Views
4K
Centre of mass (composite rod) - length and densities provided
  • · Replies 17 ·
Replies
17
Views
2K
How did Cavendish find the density of the Earth?
  • · Replies 24 ·
Replies
24
Views
2K
Perovskite semiconductors for solar photovoltaic cells
  • · Replies 4 ·
Replies
4
Views
2K
Density of Solution and mass percent
  • · Replies 17 ·
Replies
17
Views
5K
Concentration from density and purity
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Converting Unit Cell Volumes of Minerals to Density
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Reframing Light Bending Using Density Instead of Radius
  • · Replies 20 ·
Replies
20
Views
1K
Ice Core Density Problem (Inspired by NEEM)
  • · Replies 6 ·
Replies
6
Views
695