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Eleomelanite

A valid IMA mineral species
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About EleomelaniteHide

Formula:
(K2Pb)Cu4O2(SO4)4
Colour:
Black
Lustre:
Vitreous, Greasy
Specific Gravity:
3.790 (Calculated)
Crystal System:
Monoclinic
Name:
The name is derived from the Greek ελαιν (eleon), oil, and μλας (melas), black, due to its black color and oleaginous luster on crystal faces that are uncommon for sulfate minerals.
Unique combination of elements. Related to wulffite and parawulffite (e.g., in stoichiometry). Compare palmierite.

Novel structure type but has common structural features with klyuchevskite, alumoklyuchevskite, wulffite, parawulffite, and piypite.


Unique IdentifiersHide

Mindat ID:
47609
Long-form identifier:
mindat:1:1:47609:6
GUID
(UUID V4):
f34219cc-c7ae-4190-8873-50787ef07829

IMA Classification of EleomelaniteHide

Classification of EleomelaniteHide

7.BC.52

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

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

SymbolSourceReference
ElmIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of EleomelaniteHide

Vitreous, Greasy
Transparency:
Translucent
Comment:
Oleaginous on crystal faces and vitreous on a cleavage surfaces
Colour:
Black
Density:
3.790 g/cm3 (Calculated)

Optical Data of EleomelaniteHide

Type:
Biaxial (-)
RI values:
nα = 1.646(3) nβ = 1.715(6) nγ = 1.734(6)
2V:
Measured: 60° (15)
Max Birefringence:
δ = 0.088
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High

Chemistry of EleomelaniteHide

Mindat Formula:
(K2Pb)Cu4O2(SO4)4

Crystallography of EleomelaniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.3986(3) Å, b = 4.8911(1) Å, c = 18.2293(5) Å
β = 104.409(3)°
Ratio:
a:b:c = 1.922 : 1 : 3.727
Unit Cell V:
811.63 ų (Calculated from Unit Cell)
Comment:
P21/n

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.07 Å(63)
7.38 Å(44)
3.699 Å(78)
3.658 Å(100)
3.173 Å(40)
2.915 Å(35)
2.683 Å(36)
2.576 Å(51)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
45a : [Sulfates, arsenates, selenates, antimonates]

Type Occurrence of EleomelaniteHide

General Appearance of Type Material:
Interrupted crusts up to 6 mm across and up to 0.3 mm thick consisting of equant, prismatic, or tabular crystals or grains up to 0.3 mm.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia, number 95347.
Geological Setting of Type Material:
Fumarole
Associated Minerals at Type Locality:
Reference:
Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Chukanov, N.V., Belakovskiy, D.I., Sidorov, E.G., Britvin, S.N., Turchkova, A.G., Pushcharovsky, D.Y. (2020) Eleomelanite, (K2Pb)Cu4O2(SO4)4, a new mineral species from the Tolbachik Volcano, Kamchatka, Russia. The Canadian Mineralogist: 58(5): 625–636.

Synonyms of EleomelaniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Eleomelanite associated with EuchlorineKNaCu3(SO4)3O

Related Minerals - Strunz-mindat GroupingHide

7.BC.Adranosite-(Fe)(NH4)4NaFe3+2(SO4)4Cl(OH)2Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.BC.Adranosite(NH4)4NaAl2(SO4)4Cl(OH)2Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.BC.D'Ansite-(Mn)Na21Mn2+(SO4)10Cl3Iso. 4 3m : I4 3d
7.BC.AgaitePb3CuTeO5(OH)2(CO3) Orth. mm2 : Pca21
7.BC.D'Ansite-(Fe)Na21Fe2+(SO4)10Cl3Iso. 4 3m : I4 3d
7.BC.Acmonidesite(NH4,K,Pb)8NaFe2+4(SO4)5Cl8Orth. 2 2 2 : C2 2 21
7.BC.BackitePb2AlTeO6ClTrig. 3 2 : P3 1 2
7.BC.HagstromitePb8Cu2+(Te6+O6)2(CO3)Cl4Orth. mmm (2/m 2/m 2/m) : Ibam
7.BC.WildcatiteCaFe3+Te6+O5(OH)Trig. 3m (3 2/m) : P3 1m
7.BC.FranksousaitePbCu(Se6+O4)(OH)2Mon. 2/m : P21/m
7.BC.ZincochenitePb4Zn(OH)6(SO4)2Tric. 1 : P1
7.BC.ViskontitePb5Cu2(SO4)3(SeO3)(OH)6Orth. mm2 : Pmn21
7.BC.05D'AnsiteNa21Mg(SO4)10Cl3Iso. 4 3m : I4 3m
7.BC.07ApateliteFe3(SO4)2(OH)5 · 0.5H2O
7.BC.07Unnamed (Ba-Fe Vanadate)Ba, Fe, V, O, H
7.BC.10AluniteKAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Ammonioalunite(NH4)Al3(SO4)2(OH)6Trig.
7.BC.10Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10DorallchariteTlFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10HuangiteCa0.5Al3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10JarositeKFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10NatroaluniteNaAl3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
7.BC.10OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.10WalthieriteBa0.5Al3(SO4)2(OH)6Trig.
7.BC.10Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
7.BC.15Ye'elimiteCa4Al6(SO4)O12Iso. 4 3 2 : I41 3 2
7.BC.20AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3ClTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
7.BC.20NabokoiteKCu7(SO4)5(Te4+O3)OClTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
7.BC.20PuniniteNa2Cu3O(SO4)3Mon. 2/m : B2/b
7.BC.25ChlorothioniteK2Cu(SO4)Cl2Orth. mmm (2/m 2/m 2/m) : Pnma
7.BC.30EuchlorineKNaCu3(SO4)3OMon. 2/m
7.BC.30FedotoviteK2Cu3(SO4)3OMon. 2/m : B2/b
7.BC.35KamchatkiteKCu3(SO4)2OClOrth. mmm (2/m 2/m 2/m) : Pnma
7.BC.40PiypiteK4Cu4O2(SO4)4 · (Na,Cu)ClTet. 4 : I4
7.BC.45KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2Mon. 2
7.BC.45AlumoklyuchevskiteK3Cu3(Al,Fe3+)(SO4)4O2Tric. 1 : P1
7.BC.45BelousoviteKZn(SO4)ClMon. 2/m : P21/b
7.BC.47MülleritePb2Fe3+(Te6+O6)ClTrig. 3 2 : P31 1 2
7.BC.50CaledonitePb5Cu2(SO4)3(CO3)(OH)6Orth. mm2 : Pmn21
7.BC.50ElasmochloiteNa3Cu6BiO4(SO4)5Mon. 2/m
7.BC.55WherryitePb7Cu2(SO4)4(SiO4)2(OH)2Mon. 2/m : B2/m
7.BC.55FalgariteK4(VO)3(SO4)5Mon. 2/m : B2/b
7.BC.57KrasheninnikoviteKNa2CaMg(SO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
7.BC.60MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2Mon. 2 : B2
7.BC.60WulffiteK3NaCu4O2(SO4)4Orth. mm2
7.BC.60ParawulffiteK5Na3Cu8O4(SO4)8Mon. 2/m : P2/b
7.BC.62ShuvaloviteK2(Ca2Na)(SO4)3FOrth. mmm (2/m 2/m 2/m) : Pnma
7.BC.65LinaritePbCu(SO4)(OH)2Mon. 2/m : P21/m
7.BC.65SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4Mon. 2/m : P21/m
7.BC.65MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4Mon. 2/m : P21/m
7.BC.65Therasiaite(NH4)3KNa2Fe2+Fe3+(SO4)3Cl5Mon. m : Bb
7.BC.65SaccoiteCa2Mn3+2F(OH)8 · 0.5(SO4)Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
7.BC.70ChenitePb4Cu(SO4)2(OH)6Tric. 1 : P1
7.BC.75KrivovichevitePb3Al(OH)6(SO4)(OH)Trig. 3m : R3c
7.BC.80AnhydrokainiteKMg(SO4)Cl

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.

Internet Links for EleomelaniteHide

References for EleomelaniteHide

Reference List:

Localities for EleomelaniteHide

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 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.
Russia (TL)
 
  • Kamchatka Krai
    • Milkovsky District
      • Tolbachik Volcanic field
        • Great Fissure eruption (Main Fracture)
          • Northern Breakthrough (North Breach)
            • Second scoria cone
 
Mineral and/or Locality  
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