Mono-isotopic silica melting points?

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SUMMARY

The discussion focuses on whether the three stable silicon isotopes (28Si, 29Si, 30Si) significantly affect the melting point of silica (SiO2). Oxygen is effectively mono-isotopic with 16O at over 99%, simplifying the isotopic variation to silicon. It is established that heavier isotopes generally increase melting points, as exemplified by D2O's higher melting point compared to H2O. The user seeks a quantitative equation relating molecular mass to melting point to evaluate isotopic effects on silica's melting behavior, relevant for designing pure silica fiber-reinforced windows without adhesives.

PREREQUISITES

  • Isotopic mass effects on physical properties
  • Thermodynamics of phase transitions and melting points
  • Silicon and oxygen isotope distributions in silica (SiO2)
  • Material science of silica fiber reinforcement

NEXT STEPS

  • Research isotope-dependent melting point equations, including mass-dependent vibrational energy models
  • Study silicon isotope fractionation effects on silica crystal lattice stability
  • Explore experimental data on isotopically enriched silica melting points
  • Investigate pure silica fiber mesh fabrication techniques for adhesive-free reinforcement

USEFUL FOR

Materials scientists, geochemists, and engineers involved in isotopic analysis, silica-based material design, and high-purity fiber reinforcement applications will benefit from this discussion.

Nik_2213
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Sorry, my Google-Fu cannot find any' reference...

Silicon has stable isotopes '28' ~92%, '29' ~5% and '30' ~3%.
Oxygen has stable isotope '16' at >99 %, so effectively mono-isotopic.

Do the three Si isotopes have significant effect on melting point etc of their silica SiO2 ??

For a 'world-build' (*), I'm trying to figure how pure silica window(s) might be reinforced with pure silica fibre mesh / web. Without none-silica interlayer(s) or adhesive...

*) Sounded 'plausible' until third read-through prompted, 'Huh ??'
 
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Nik_2213 said:
Do the three Si isotopes have significant effect on melting point etc of their silica SiO2 ??
In theory melting point of heavier mono isotope is higher.
$$T_{28}<T_{29}< T_{30} $$
For an example D2O has melting point 3.82 degree Celsius.
We need an equation of melting point that includes mass of molecule to investigate the difference in quantity.
 
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