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Nickelpicromerite

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Formula:
K2Ni(SO4)2•6H2O
Colour:
Light greenish blue
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
2.20
Crystal System:
Monoclinic
Name:
From the mineral picromerite and its nickel content
Nickelpicromerite is the product of alteration of primary sulfide minerals and the reaction of the acid Ni-sulfate solutions with biotite (Belogub et. al. 2015)


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Classification of NickelpicromeriteHide

Approved
Approval Year:
2012

Physical Properties of NickelpicromeriteHide

Vitreous
Colour:
Light greenish blue
Hardness:
2 - 2½ on Mohs scale
Cleavage:
Distinct/Good
Parallel to {10–2}.
Density:
2.20 g/cm3 (Measured)    2.22 g/cm3 (Calculated)

Optical Data of NickelpicromeriteHide

Type:
Biaxial (+)
RI values:
nα = 1.486(2) nβ = 1.489(2) nγ = 1.494(2)
2V:
Measured: 75° (10), Calculated: 76°
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of NickelpicromeriteHide

Formula:
K2Ni(SO4)2•6H2O
IMA Formula:
K2Ni(SO4)2 · 6H2O

Crystallography of NickelpicromeriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 6.1310 Å, b = 12.1863 Å, c = 9.0076 Å
β = 105.045°
Ratio:
a:b:c = 0.503 : 1 : 0.739
Unit Cell V:
649.9 ų
Z:
2
Morphology:
Equant to short prismatic or tabular crystals up to 0.07 mm; anhedral grains up to 0.5 mm across.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.386(34)
4.312(46)
4.240(33)
4.085(100)
3.685(85)
3.041(45)
2.808(31)
2.368(34)
Comments:
From Type Description.

Type Occurrence of NickelpicromeriteHide

Place of Conservation of Type Material:
Natural Scientific Museum of the Ilmen State Reserve, Miass, Russia, specimen number 17301, and the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4281/1
Geological Setting of Type Material:
In the fractures of slightly weathered actinolite-talc schist
Associated Minerals at Type Locality:

Synonyms of NickelpicromeriteHide

Relationship of Nickelpicromerite to other SpeciesHide

Other Members of this group:
Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m
Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2O
PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for NickelpicromeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Belogub, E.V., Krivovichev, S.V., Pekov, I.V., Kuznetsov, A.M., Kotlyarov, V.A., Chukanov, N.V. and Belakovskiy, D.I. (2013) Nickelpicromerite, IMA 2012-053. CNMNC Newsletter No. 15, February 2013, page 4; Mineralogical Magazine, 77, 1-12.
Belogub, E.V., Krivovichev, S.V., Pekov, I.V., Kuznetsov, A.M., Yapaskurt, V.O., Kotlyarov, V.A., Chukanov, N.V., Belakovskiy, D.I. (2015): Nickelpicromerite, K2Ni(SO4)2•6H2O, a new picromerite-group mineral from Slyudorudnik, South Urals, Russia. Mineralogy and Petrology, 109, 143-152

Internet Links for NickelpicromeriteHide

Localities for NickelpicromeriteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Kyshtym (Kychtym; Kishtim)
Belogub, E.V., Krivovichev, S.V., Pekov, I.V., Kuznetsov, A.M., Kotlyarov, V.A., Chukanov, N.V. and Belakovskiy, D.I. (2013) Nickelpicromerite, IMA 2012-053. CNMNC Newsletter No. 15, February 2013, page 4; Mineralogical Magazine, 77, 1-12.; Belogub, E.V., Krivovichev, S.V., Pekov, I.V., Kuznetsov, A.M., Yapaskurt, V.O., Kotlyarov, V.A., Chukanov, N.V., Belakovskiy, D.I. (2015): Nickelpicromerite, K2Ni(SO4)2•6H2O, a new picromerite-group mineral from Slyudorudnik, South Urals, Russia. Mineralogy and Petrology, 109, 143-152
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