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Zaccagnaite

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Zaccagnaite
General
CategoryMineral
Formula
(repeating unit)
formula Zn4Al2CO3(OH)12·3H2O
IMA symbolZac
Crystal systemHexagonal
Identification
ColorWhite
StreakWhite
Optical propertiesUniaxial (-)

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.

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References

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