Constituent
- Name
- Quartz polymorphs
- IMA name
- Quartz polymorphs
- Class
- silicate mineral
- Compound type
- tektosilicate
- Comments
- mostly Si Tetrahedral Frameworks SiO2 with [4] coordinated Si, except Stishovite
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0
- Formula
- $SiO_2$
- Chemical formula
- SiO2
- Elemental formula
- Si O2
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula $SiO_{2}$ Mass fraction (%) 100.0
Strunz
- Class
- oxides - hydroxides - arsenites (04)
- Division
- metal:oxygen = 1:2 and similar (04.D)
- Family
- with small cations: Silica family (04.DA)
Dana
- Major class
- silicates (VIII)
- Class
- tectosilicate Si tetrahedral frameworks (75)
- Type
- SiO2 with [4] coordinated Si (75.01)
- Group
- N/A (N/A)
- Phase type
- crystalline
- Crystal system
- various
- Crystal class
- various
- Crystal class symbol
- various
- Crystal spacegroup
- various
- Composition order
- ordered
- Molar mass
- 60.08 $g/mol$
- Density
- 2.25 - 4.35 $g/cm^3$
- Refringence type
- various
- Birefringence
- 0.003 - 0.027
- Refraction index $n_{\alpha}$
- 1.468 - 1.800
- Refraction index $n_{\beta}$
- 1.470 - 1.845
- Refraction index $n_{\gamma}$
- 1.474 - 1.599
- Dispersion V
- none
- Color
- colorless, blue-gay, brown, violet, gray, yellow
- Diaphaneity
- transparent to translucent
- Luster
- vitreous