Mineral Factbook

Hellyerite

Ni(CO₃)·₆H₂OIMA symbol: Hyapproved

Hellyerite is a carbonate or nitrate mineral with the formula Ni(CO3)·6H2O, crystallizing in the triclinic system.

Photos

Hellyerite specimen photo — Leon Hupperichs · CC BY-SA 3.0 · Commons

Hellyerite specimen photo — Leon Hupperichs · CC BY-SA 3.0 · Commons

Hellyerite specimen photo — Robert M. Lavinsky · CC BY-SA 3.0 · Commons

Hellyerite specimen photo — Robert M. Lavinsky · CC BY-SA 3.0 · Commons

Physical properties

Chemistry (calculated)

Molecular weight	226.79 g/molcalculated from the IMA formula
Composition (wt%)	Ni 25.88%, C 5.3%, O 63.49%, H 5.33%

Classification

Nickel-Strunz (10th)	5.CA.20Wikidata (CC0)
Nickel-Strunz (9th)	5.CA.20Wikidata (CC0)