Wulffite (original) (raw)

A valid IMA mineral species

About WulffiteHide

This section is currently hidden. Click the show button to view.

Colour:

Dark green with bluish hue or deep emerald-green.

Crystal System:

Orthorhombic

Name:

Named in honor of the Russian crystallographer Georgiy Viktorovich Wulff (22 June 1863, Nizhyn (Russian Empire, nowadays Ukraine) – 25 December 1925, Moscow), who suggested the model of X-ray interference in crystals (1913).

Related to parawulffite in terms of both chemistry and structure. One of 4 K-Na-Cu sulfate minerals beside euchlorine, parawulffite, and piypite.

Structure details: (1) the heteropolyhedral quasi-framework of Cu–O–S, along [010], and NaO6 octahedra chains ; (2) Cu–O–S chains comprise Cu-centered square pyramids ([4+1] coordination of Cu) and sulfate tetrahedra; (3) different ratios of alkali cations and their arrangement in cavities of the quasi-framework when compared to parawulffite; (4) different configuration of Cu–O–S chains than that in parawulffite.

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:43897:1

e39dc0db-68d6-4220-a2a8-5cddf981fb69

IMA Classification of WulffiteHide

This section is currently hidden. Click the show button to view.

Classification of WulffiteHide

This section is currently hidden. Click the show button to view.

7.BC.60

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

This section is currently hidden. Click the show button to view.

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

Physical Properties of WulffiteHide

This section is currently hidden. Click the show button to view.

Colour:

Dark green with bluish hue or deep emerald-green.

Cleavage:

Perfect
2 perfect cleavages || elongation; additional one, coplanar to (010)

Density:

3.23(2) g/cm3 (Measured) 3.19 g/cm3 (Calculated)

Optical Data of WulffiteHide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 1.582(3) _n_β = 1.610(3) _n_γ = 1.715(3)

δ = 0.133

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

Comments:

emerald-green (Z), medium-saturation green (Y), Z > Y

Chemistry of WulffiteHide

This section is currently hidden. Click the show button to view.

Mindat Formula:

K3NaCu4O2(SO4)4

Crystallography of WulffiteHide

This section is currently hidden. Click the show button to view.

Crystal System:

Orthorhombic

Class (H-M):

m _m_2 - Pyramidal

Cell Parameters:

a = 14.2810(6) Å, b = 4.9478(2) Å, c = 24.113(1) Å

Ratio:

a:b:c = 2.886 : 1 : 4.873

Morphology:

coarse prismatic crystals up to 1.2 × 2 mm, in clusters and crusts; [010] elongation

Comment:

Space group is Pn21a

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of WulffiteHide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Place of Conservation of Type Material:

Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4385/1

Geological Setting of Type Material:

incrustations on (1) basaltic scoria, (2) tenorite or (3) aphthitalite

Associated Minerals at Type Locality:

Synonyms of WulffiteHide

This section is currently hidden. Click the show button to view.

Common AssociatesHide

This section is currently hidden. Click the show button to view.

Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

IR Spectrum:

[cm-1]: ~1223, 1198, 1153s, 1118s (asymmetric stretching of sulfate), 1026s, 989s (symmetric stretching of sulfate), 671, 645sh, 635, 612 (bending of sulfate), 535sh, 511 (lattice modes: stretching of shorter bonds in Cu-centered polyhedra and

Notes:

slowly dissolves in RT 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.

Internet Links for WulffiteHide

This section is currently hidden. Click the show button to view.

References for WulffiteHide

This section is currently hidden. Click the show button to view.

Reference List:

Pekov, I. V., Zubkova, N. V., Yapaskurt, V. O., Belakovskiy, D. I., Chukanov, N. V., Lykova, I. S., Savelyev, D. P., Sidorov, E. G., Pushcharovsky, D. Y. (2014) Wulffite, K3NaCu4O2(SO4)4, and parawulffite, K5Na3Cu8O4(SO4)8, two new minerals from fumarole sublimates of the Tolbachik Volcano, Kamchatka, Russia. The Canadian Mineralogist, 52 (4) 699-716 doi:10.3749/canmin.1400018

Localities for WulffiteHide

This section is currently hidden. Click the show button to view.

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 section is currently hidden. Click the show button to view.

- 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.