Mineral phase
- IMA name
- Smithsonite
- Secondary names
- Zinc carbonate; Zn carbonate
- IMA Code
- Smt
- CAS number
- 3486-35-9
- Class
- non-silicate mineral
- Compound type
- carbonate
- Formula
- Chemical formula
- ZnCO3
- Elemental formula
- (Zn2+) C O (O-)2
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula Mass fraction (%) 64.9 35.1
Strunz
- Class
- carbonates - nitrates (05)
- Division
- carbonates without additional anions, without H2O (05.A)
- Family
- Alkali-earth (and other M2+) carbonates (05.AB)
- Code
- 05.AB.05
Dana
- Major class
- carbonates, nitrates, borates (V)
- Class
- anhydrous carbonates (14)
- Type
- with simple formula A+CO3 (14.01)
- Group
- Calcite group (Trigonal: R-3c) (14.01.01)
- Code
- 14.01.01.06
- Phase type
- crystalline
- Crystal system
- trigonal
- Crystal class
- ditrigonal-scalenohedral
- Crystal class symbol
- -3m (D3d)
- Crystal spacegroup
- R-3c
- Molar mass
- 125.40
- Density
- 4.43
- State NTP
- solid
- Refringence type
- uniaxial
- Refringence sign
- negative
- Birefringence
- 0.223 - 0.227
- Refraction index (w)
- 1.842 - 1.850
- Refraction index (e)
- 1.619 - 1.623
- Pure color
- colorless
- Color
- colorless, white, grey, yellow, green to apple-green, blue, pink, purple, bluish grey, and brown
- Diaphaneity
- transparent to translucent
- Luster
- vitreous