Zaccagnaite

Zaccagnaite
General
Category	Mineral
Formula (repeating unit)	formula Zn4Al2CO3(OH)12·3H2O
IMA symbol	Zac
Crystal system	Hexagonal
Identification
Color	White
Streak	White
Optical properties	Uniaxial (-)

Zaccagnaite is a mineral, with a formula Zn₄Al₂CO₃(OH)₁₂·3H₂O. It occurs as white hexagonal crystals associated with calcite in cavites in Carrara marble of the Italian Alps and is thought to have formed by hydrothermal alteration of sphalerite in an aluminium rich environment. It is named after Domenico Zaccagna (1851–1940), an Italian mineral collector.

See also

• List of minerals
• List of minerals named after people

References

• Webmineral data
• Mindat.org