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density of SiO2

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R.Takeuchi

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Sep 17, 1994, 1:12:11 PM9/17/94
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Do you Know density of silicon dioxide(SiO2)?
I need it.
--

C R.Takeuchi
C 63l...@cfi.waseda.ac.jp

Daniel F Schmidt

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Sep 17, 1994, 11:06:49 PM9/17/94
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Excerpts from netnews.sci.chem: 17-Sep-94 density of SiO2 by
"R.Takeuchi"@cfi.waseda.
>Do you Know density of silicon dioxide(SiO2)?

Well, according to the 12th edition Materials Handbook, amorphous
silica glass (Basically non-crystalline SiO2) has a density of 2.21
(g/cm cubed). Also, crystalline SiO2 (quartz) has a specific gravity of
2.65. Hope this helps!

I)aniel Schmidt

AKA

[-(-<Vector>-)-]

AL. Davies

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Sep 19, 1994, 6:06:33 AM9/19/94
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R.Takeuchi (63l...@cfi.waseda.ac.jp) wrote:
: Do you Know density of silicon dioxide(SiO2)?
: I need it.
: --


The molar volume of quartz is 22.688 cc
cristobalite is 25.739 cc
tridymite is 26.53 cc
coesite is 20.641 cc
stishovite is 14.014 cc

All these are SiO2...

Robie, Hemingway & Fisher (1978)
Thermodynamic Properties of Minerals...
United States Geological Survey Bulletin 1452


Alastair Davies
Department of Geology
University of Bristol, U.K.

Alastai...@bristol.ac.uk

Vince Hackley

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Sep 20, 1994, 10:25:01 AM9/20/94
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SiO2 density can vary from about 1.9 (for low density, amorphous
material)to 2.6 (quartz).The CRC gives several values for crystalline
morphs:cristobalite (2.32), lechatelierite (2.19), tridymite (2.26) and
quartz (2.64-2.66).

Vince Hackley
Research Chemist
National Institute of Standards and Technology
skin...@enh.nist.gov

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