Nickelblödite

Nickelblödite
General
Category Sulfate mineral
Formula
(repeating unit)
Na2Ni(SO4)2•4H2O
Strunz classification 7.CC.50
Dana classification 29.3.3.2
Crystal system Monoclinic, P21/a
Unit cell a=10.87, b=8.07, c=5.46 [Å], β=100.43o
Identification
Color Pale yellowish-green to pale green
Crystal habit flat crystallites
Crystal symmetry Monoclinic - Prismatic (2/m)
Diaphaneity Translucent
Density 2.43 (calculated)
Optical properties Biaxal (-)
Refractive index nα=1.50-1.51, nβ=1.51-1.52, nγ=1.51-1.52 (approximated)
Common impurities Mg, Fe
References [1][2][3]

Nickelblödite is a rare nickel mineral with the formula Na2Ni(SO4)2•4H2O.[1][3] Nickelblödite was discovered in nickel mines in Carr Boyd Rocks and Kambalda, Western Australia.[1] The mineral is a nickel-analogue of blödite, changoite, cobaltoblödite and manganoblödite - other representatives of the blödite group.[3]

Notes on chemistry

Nickelblödite contains small admixtures of magnesium and iron.[2]

Association and origin

Minerals associating with nickelblödite include violarite, morenosite, halite, pyrite, and siderite.[2]

References

  1. 1 2 3 Nickel, E.W., and Bridge, P.J., 1977. Nickelblödite, Na2Ni(SO4)2·4H2O, a new mineral from Western Australia. Mineralogical Magazine 41, 37-41
  2. 1 2 3 "Nickelblödite - Handbook of Mineralogy" (PDF). Handbookofmineralogy.org. Retrieved 2016-03-11.
  3. 1 2 3 "Nickelblödite: Nickelblödite mineral information and data". Mindat.org. Retrieved 2016-03-11.


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