Mineral phase
- IMA name
- Zircon
- Secondary names
- Cyrtolite, Hyacinth, Jarcon, Malacon
- Class
- silicate mineral
- Compound type
- nesosilicate
- Formula
- $ZrSiO_4$
- Chemical formula
- ZrSiO4
- Elemental formula
- Zr Si O4
- Isotope mixture type
- terrestrial abundance
- Composition comments
- substituted Hf (~5%), traces of U, Th, Pb, P, La, Ce, Pr, Nd and Sm (~5%)
Strunz
- Class
- silicates (09)
- Division
- nesosilicate (09.A)
- Family
- Nesosilicates without additional anions (09.AD)
- Code
- 09.AD.30
Dana
- Major class
- silicates (VIII)
- Class
- nesosilicate insular SiO4 groups only (51)
- Type
- with cations in >[6] coordination (51.05)
- Group
- Zircon group (51.05.02)
- Code
- 51.05.02.01
- Phase type
- crystalline
- Crystal system
- tetragonal
- Crystal class
- ditetragonal-dipyramidal
- Crystal class symbol
- 4/mmm (D4h)
- Crystal spacegroup
- I4(1)/amd
- Comments
- May be partly or fully metamict (U and Th rich crystals)
- Molar mass
- 183.307 $g/mol$
- Density
- 4.6 - 4.7 (calc.: 4.714) $g/cm^3$
- State NTP
- solid
- Refringence type
- uniaxial
- Refringence sign
- negative
- Birefringence
- 0.047 - 0.055
- Refraction index $n_o$ (w)
- 1.967 - 2.015
- Refraction index $n_e$ (e)
- 1.92 - 1.96
- Pure color
- colorless
- Color
- colorless, yellow, gray, green, reddish brown, brown
- Diaphaneity
- transparent to opaque
- Luster
- adamantine