Puninite (original) (raw)

A valid IMA mineral species

About PuniniteHide

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Specific Gravity:

3.284 (Calculated)

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.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:46673:4

0f417bf9-6326-4802-ab27-7d7721a2c6c6

IMA Classification of PuniniteHide

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Type description reference:

Siidra, Oleg I., Nazarchuk, Evgenii V., Zaitsev, Anatoly N., Lukina, Evgeniya A., Avdontseva, Evgeniya Y., Vergasova, Lidiya P, Vlasenko, Natalia S., Filatov, Stanislav K., Turner, Rick, Karpov, Gennady A. (2017) Copper oxosulphates from fumaroles of Tolbachik volcano: puninite, Na2Cu3O(SO4)3 – a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy, 29 (3) 499-510 doi:10.1127/ejm/2017/0029-2619

Classification of PuniniteHide

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7.BC.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of PuniniteHide

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Fracture:

Irregular/Uneven

Density:

3.284 g/cm3 (Calculated)

Comment:

Could not be measured due to lack of material.

Optical Data of PuniniteHide

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RI values:

_n_α = 1.562(2) _n_β = 1.591(2) _n_γ = 1.634(2)

δ = 0.072

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of PuniniteHide

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Mindat Formula:

Na2Cu3O(SO4)3

Crystallography of PuniniteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

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

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

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Type Occurrence of PuniniteHide

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General Appearance of Type Material:

As crystalline crusts, individual crystals up
to 10 x 30 x 50 µm (usually 5-20 µm) in size, and as irregularly shaped grains.

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

Geological Setting of Type Material:

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

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Relationship of Puninite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of PuniniteHide

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Other InformationHide

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Notes:

Soluble in water.
Unstable under a spot electron beam, with strong sodium loss.

Health Risks:

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

Internet Links for PuniniteHide

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References for PuniniteHide

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Reference List:

Siidra, Oleg I., Nazarchuk, Evgenii V., Zaitsev, Anatoly N., Lukina, Evgeniya A., Avdontseva, Evgeniya Y., Vergasova, Lidiya P, Vlasenko, Natalia S., Filatov, Stanislav K., Turner, Rick, Karpov, Gennady A. (2017) Copper oxosulphates from fumaroles of Tolbachik volcano: puninite, Na2Cu3O(SO4)3 – a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy, 29 (3) 499-510 doi:10.1127/ejm/2017/0029-2619

Siidra, Oleg I., Nazarchuk, Evgenii V., Zaitsev, Anatoly N., Lukina, Evgeniya A., Avdontseva, Evgeniya Y., Vergasova, Lidiya P, Vlasenko, Natalia S., Filatov, Stanislav K., Turner, Rick, Karpov, Gennady A. (2017) Copper oxosulphates from fumaroles of Tolbachik volcano: puninite, Na2Cu3O(SO4)3 – a new mineral species and structure refinements of kamchatkite and alumoklyuchevskite. European Journal of Mineralogy, 29 (3) 499-510 doi:10.1127/ejm/2017/0029-2619

Localities for PuniniteHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.