Calculating Density of SiO2 in the Periodic Table

In summary: Atomic weight of each element.The density of SiO2 can be calculated using Equation 1.4. The density of Si is 2.33 g/cm3, and the atomic weight of Si is 28.98. The density of SiO2 is then calculated to be 1.449 g/cm3.
  • #1
physicist888
63
0
in the periodic table we have the density of each element ( density(Si) = 2.33), density(O)=1.429). i wonder how we could calculate the density of SiO2 ?
 
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  • #2
It isn't possible to simply calculate it, knowing only the densities of the two pure elements. Each compound can form crystals, sometimes many different kinds of crystals, and each will have its own density.

- Warren
 
  • #3
an how we could calculate it? is there an equation? the density of SiO2 = ?
 
  • #4
Ti-Al ??flux?

to creat a film of alloy Al and Ti we use to flux of each element and a substrat.
if the flux of Al is double of that of Ti, then we obtain an alloy on the substrat AlTi or what?
 
  • #5
physicist888 said:
the density of SiO2 = ?

Try google. Also, SiO2 is so common that the density is listed in most tables of material properties.
 
  • #6
i know the value, but i need to know how to calculate it
 
  • #7
Didn't I already say that you cannot calculate it only by knowing the density of Si alone and O alone?

- Warren
 
  • #8
then which other values do we need to calculate it??
 
  • #9
You need to know its bond angles and lengths, crystal organization, etc.

- Warren
 
  • #10
and you don't know about the other question??
((to creat a film of alloy Al and Ti we use to flux of each element and a substrat.
if the flux of Al is double of that of Ti, then we obtain an alloy on the substrat AlTi or what?))
 
  • #11
Also almost impossible to answer. What kind of film you end up will depend on many different parameters (including deposition parameters such as temperature, pressure etc). My guess would be that you would end up with a granular film with grains of Al and Ti (Al tends to form small grains so the film might even be quite dense).
But again, that is only a guess.
In order to calculate something like that you would need a reasonably good supercomputer and extensive knowledge of DFT calculations
 
  • #12
would it be possible to calculate the density of SiO2 just from the following:

(1) Cell vectors of Unit cell (ie. Volume)
(2) Formula Units per unit cell. (ie. Mass of the atoms in the unit cell)
 

1. How do you calculate the density of SiO2?

To calculate the density of SiO2, you need to know the mass and volume of the substance. The formula for density is mass divided by volume. So, to calculate the density of SiO2, divide the mass of SiO2 by its volume.

2. What is the mass of SiO2?

The mass of SiO2 can vary depending on the amount of substance being measured. However, the molar mass of SiO2 is approximately 60.08 g/mol.

3. What is the volume of SiO2?

The volume of SiO2 also varies depending on the amount being measured. However, the molar volume of SiO2 is approximately 22.7 cm³/mol.

4. How do you find the mass of SiO2 in the Periodic Table?

The mass of SiO2 can be found by looking at the atomic mass of silicon (Si) and oxygen (O) in the Periodic Table. The atomic mass of Si is 28.09 g/mol and the atomic mass of O is 16.00 g/mol. So, the mass of SiO2 (Si+2O) would be 60.08 g/mol.

5. How does the density of SiO2 compare to other elements in the Periodic Table?

The density of SiO2 is relatively high compared to other elements in the Periodic Table. It is denser than elements such as iron and copper, but less dense than elements such as lead and gold.

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