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Puninite

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Formula:
Na2Cu3O(SO4)3
Colour:
Emerald green
Crystal System:
Monoclinic
Name:
Named in honor of Yurii Olegovich Punin (Юрий Олегович Пунин) (1941–2014), Russian crystallographer at the Institute of Earth Sciences, Department of Crystallography, St. Petersburg State University, Russia. He was an expert on the growth of crystals and genetic mineralogy.
The first Na-dominant Cu oxosulphate of the locality; chemically somewhat resembling saranchinaite. Compare also euchlorine, wulffite, and parawulffite.

May be a representative of "euchlorine group"; the unit-cell parameter a of this group is very sensitive to the K/Na ratio.

Structurally related to euchlorine and fedotovite. As in the case of all other Cu oxysulphate minerals, the structure organizanion may be described via a “host–guest” principle. It consists, i.a., of [O2Cu6]8+ dimers. The dimers contact with four sulphate tetrahedra in a "face-to-face"; the remaining sulphate groups link the dimers in two dimensions.




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Classification of PuniniteHide

Approved
Approval Year:
2015
First Published:
2017

Physical Properties of PuniniteHide

Colour:
Emerald green

Optical Data of PuniniteHide

Type:
Biaxial (+)
RI values:
nα = 1.562(2) nβ = 1.591(2) nγ = 1.634(2)
2V:
Calculated: 80.7°
Max Birefringence:
δ = 0.072
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of PuniniteHide

Formula:
Na2Cu3O(SO4)3

Crystallography of PuniniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 17.41(1) Å, b = 9.39(1) Å, c = 14.40(1) Å
β = 112.04(7)°
Ratio:
a:b:c = 1.854 : 1 : 1.534
Unit Cell V:
2183 ų
Z:
8

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.058Å(100)
6.675Å(19)
6.466Å(28)
4.398Å(14)
4.247Å(17)
3.839Å(34)
2.853Å(29)
2.724Å(15)
Comments:
From Type Description.

Geological EnvironmentHide

Paragenetic Mode(s):
•  Fumarolic

Type Occurrence of PuniniteHide

Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum, Department of Mineralogy, St Petersburg State University, St Petersburg, Russia, specimen number 19638
Empirical Formula of Type Material:
(Na1.76K0.08)Σ 1.84(Cu2.97Zn0.04)Σ 3.01(SO4)3.02O0.92
Associated Minerals at Type Locality:
Reference:
Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N., Lukina, E.A., Avdontseva, E.Y., Vergasova, L.P., Vlasenko, N.S., Filatov, S.K., Turner, R., Karpov, G.A. (2017) Copper oxosulphates from fumaroles of Tolbachik Vulcano: puninite, Na2Cu3O(SO4)3 - a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy: 29: 499-510.

Synonyms of PuniniteHide

Relationship of Puninite to other SpeciesHide

Other Members of this group:
EuchlorineKNaCu3(SO4)3OMon.

Other InformationHide

Notes:
Soluble in water
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 PuniniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Siidra, O.I., Nazarchuk, E.V., Lukina, E.A., Zaitsev, A.N., Avdontseva, E.Y., Vergasova, L.P., Filatov, S.K., Vlasenko, N.S., Turner, R. and Karpov, G.A. (2015) Puninite, IMA 2015-012. CNMNC Newsletter No. 26, August 2015, page 942. Mineralogical Magazine: 79: 941-947.
Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N., Lukina, E.A., Avdontseva, E.Y., Vergasova, L.P., Vlasenko, N.S., Filatov, S.K., Turner, R., Karpov, G.A. (2017) Copper oxosulphates from fumaroles of Tolbachik Vulcano: puninite, Na2Cu3O(SO4)3 - a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy: 29: 499-510.
Erratum: Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N., Lukina, E.A., Avdontseva, E.Y., Vergasova, L.P., Vlasenko, N.S., Filatov, S.K., Turner, R., Karpov, G.A. (2017) Copper oxosulphates from fumaroles of Tolbachik Vulcano: puninite, Na2Cu3O(SO4)3 - a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy: 29: 1089.

Internet Links for PuniniteHide

Localities for PuniniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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)
 
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
          • Second scoria cone
Siidra, O.I., Nazarchuk, E.V., Lukina, E.A., Zaitsev, A.N., Avdontseva, E.Y., Vergasova, L.P., Filatov, S.K., Vlasenko, N.S., Turner, R. and Karpov, G.A. (2015) Puninite, IMA 2015-012. CNMNC Newsletter No. 26, August 2015, page 942; Mineralogical Magazine, 79, 941-947; Siidra, O.I., Nazarchuk, E.V., Zaitsev, A.N., Lukina, E.A., Avdontseva, E.Y., Vergasova, L.P., Vlasenko, N.S., Filatov, S.K., Turner, R., Karpov, G.A. (2017) Copper oxosulphates from fumaroles of Tolbachik Vulcano: puninite, Na2Cu3O(SO4)3 - a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy: 29: 499-510.
 
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