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Omariniite

A valid IMA mineral species
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09973860017272472872537.jpg
Omariniite, etc.

Capillitas mining district, Andalgalá, Andalgalá Department, Catamarca Province, Argentina
09973860017272472872537.jpg
Omariniite, etc.

Capillitas mining district, Andalgalá, Andalgalá Department, Catamarca Province, Argentina
09973860017272472872537.jpg
Omariniite, etc.

Capillitas mining district, Andalgalá, Andalgalá Department, Catamarca Province, Argentina
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About OmariniiteHide

00069210017272472892037.jpg
Ricardo H. Omarini
Formula:
Cu8Fe2ZnGe2S12
Colour:
Orange-brown
Lustre:
Metallic
Hardness:
3½
Specific Gravity:
4.319 (Calculated)
Crystal System:
Orthorhombic
Member of:
Stannite Group
Name:
Named in honor of Dr. Ricardo Héctor Omarini (17 March 1946, Córdoba, Argentina - 28 June 2015), Professor at the University of Salta, for his numerous contributions to the geology of Argentina.
The Ge analogue of stannoidite. Chemically somewhat similar to zincobriartite, renierite, and briartite. X-ray single-crystal studies (R1 = 0.023) revealed the structure to be a sphalerite derivative identical to that of stannoidite (Bindi et al. 2017).


Unique IdentifiersHide

Mindat ID:
50348
Long-form identifier:
mindat:1:1:50348:8

Similar NamesHide

IMA Classification of OmariniiteHide

Classification of OmariniiteHide

Strunz-mindat (2026):
2.CB.10c

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.

Mineral SymbolsHide

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

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

Physical Properties of OmariniiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Orange-brown
Comment:
in polished sections
Streak:
Brownish-black
Hardness:
3½ on Mohs scale
Hardness:
VHN100= 202 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Not observed in the polished sections
Parting:
Not observed in the polished sections
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
4.319 g/cm3 (Calculated)

Optical Data of OmariniiteHide

Anisotropism:
Distinctly, with rotation tints varying between brownish-orange and greenish-brown.
Reflectivity:
WavelengthR1 (%)R2 (%)
400nm22.0%21.9%
420nm20.9%21.5%
440nm20.2%21.0%
460nm19.7%21.0%
480nm19.5%21.0%
500nm19.4%21.1%
520nm19.75%21.4%
540nm20.4%21.8%
560nm21.2%22.2%
580nm22.1%22.8%
600nm23.2%23.5%
620nm24.2%24.2%
640nm25.3%25.0%
660nm26.2%25.7%
680nm27.2%26.6%
700nm28.2%27.4%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 28.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
orange-brown
Internal Reflections:
Absent
Pleochroism:
Weak

Chemistry of OmariniiteHide

Mindat Formula:
Cu8Fe2ZnGe2S12
Element Weights:
Element% weight
Cu41.824 %
S31.656 %
Ge11.952 %
Fe9.189 %
Zn5.379 %

Calculated from ideal end-member formula.
Elements listed:
Cu, Fe, Ge, S, Zn - search for minerals with similar chemistry

Crystallography of OmariniiteHide

Crystal System:
Orthorhombic
Class (H-M):
222 - Disphenoidal
Space Group:
I222
Cell Parameters:
a = 10.774(1) Å, b = 5.3921(5) Å, c = 16.085(2) Å
Ratio:
a:b:c = 1.998 : 1 : 2.983
Unit Cell V:
934.5 ų
Z:
2

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of OmariniiteHide

Type Locality:
ⓘ Capillitas mining district, Andalgalá, Andalgalá Department, Catamarca Province, Argentina
General Appearance of Type Material:
Seams in ore rarely exceeds 60 μm.
Place of Conservation of Type Material:
Collections of the Systematic Reference Series of the National Mineral Collection of Canada, Geological Survey of Canada, Ottawa, Ontario, Canada (catalogue number NMCC 68096)
Empirical Formula of Type Material:
Cu8.04(Fe2.03In0.02)Σ2.05Zn0.96Ge1.94S12.01
Chemical Analysis of Type Material:
Cu42.18) %
Fe9.37 %
Zn5.17 %
In0.20 %
Ge11.62 %
S31.80 %
Total:100.34 %
Geological Setting of Type Material:
In bornite-chalcocite-rich ores of the Capillitas epithermal deposit
Associated Minerals at Type Locality:
BorniteCatamarcaiteChalcociteCovelliteDigenite
LuzoniteMawsonitePutziteSphaleriteTennantite Subgroup
ThalcusiteWitticheniteZincobriartite
Reference:
Bindi, L., Putz, H., Parr, W.H., Stanley, C.J. (2017): Omariniite, Cu8Fe2ZnGe2S12, the germanium-analogue of stannoidite, a new mineral species from Capillitas, Argentina. Mineralogical Magazine:81: 1151-1159.

Synonyms of OmariniiteHide

Other Language Names for OmariniiteHide

German:Omariniit

Relationship of Omariniite to other SpeciesHide

Member of:
Stannite Group
Other Members of Stannite Group:
BriartiteCu2FeGeS4Tet.
ČernýiteCu2CdSnS4Tet. 42m : I42m
FamatiniteCu3SbS4Tet. 42m : I42m
FerrokësteriteCu2FeSnS4Tet. 4 : I4
HocartiteAg2(Fe2+,Zn)SnS4Tet. 42m : I42m
KësteriteCu2ZnSnS4Tet. 4 : I4
KeutschiteCu2AgAsS4Tet. 42m : I42m
KuramiteCu3SnS4Tet. 42m : I42m
LuzoniteCu3AsS4Tet. 42m : I42m
PermingeatiteCu3SbSe4Tet. 42m : I42m
Petrukite(Cu,Fe,Zn,Ag)3(Sn,In)S4Orth. mm2 : Pmn21
PirquitasiteAg2ZnSnS4Tet. 4 : I4
RichardsiteZn2CuGaS4Tet. 42m : I42m
StanniteCu2FeSnS4Tet. 42m : I42m
StannoiditeCu+6Cu2+2(Fe2+,Zn)3Sn2S12Orth. 222 : I222
'UM1984-30-S:CuFeSn'Cu2Fe2Sn3S7
'Unnamed (Cu-Zn-In Sulphide)'CuZn2InS4
VelikiteCu2HgSnS4Tet. 4 : I4
ZincobriartiteCu2(Zn,Fe)(Ge,Ga)S4Tet. 42m : I42m

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Omariniite associated with ThalcusiteTl2Cu3FeS4
1 photo of Omariniite associated with Putzite(Cu4.7Ag3.3)GeS6

Related Minerals - Strunz-mindat GroupingHide

2.CB.RichardsiteZn2CuGaS4Tet. 42m : I42m
2.CB.OkruginiteCu2SnSe3Mon. m : Bb
2.CB.HanswilkeiteKFeS2Mon. 2/m : B2/b
2.CB.AuroselenideAuSeMon. 2/m : B2/m
2.CB.Ruizhongite(Ag2◻)Pb3Ge2S8Iso. 43m : I43d
2.CB.AgmantiniteAg2MnSnS4Orth.
2.CB.TolstykhiteAu3S4Te6Tric. 1 : P1
2.CB.GachingiteAu(Te1-xSex)Orth. mmm(2/m2/m2/m)
2.CB.05aHawleyiteCdSIso. 43m : F43m
2.CB.05'UM1998-15-S:CuFeZn'Cu2Fe3Zn5S10
2.CB.05aColoradoiteHgTeIso. 43m : F43m
2.CB.05aMetacinnabarHgSIso. 43m : F43m
2.CB.05aTiemanniteHgSeIso. 43m : F43m
2.CB.05aSphaleriteZnSIso. 43m : F43m
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4 Iso.
2.CB.05cPolhemusite(Zn,Hg)STet.
2.CB.05aRudashevskyite(Fe,Zn)SIso. 43m : F43m
2.CB.05aStilleiteZnSeIso. 43m : F43m
2.CB.05aIshiharaite(Cu,Ga,Fe,In,Zn)SIso. 43m : F43m
2.CB.07a'Unnamed (Cu-Mn-Sn Sulphide)'Cu2MnSnS4
2.CB.07aShenzhuangiteNiFeS2Tet. 42m : I42d
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16Iso. 43m : I43m
2.CB.10bHaycockiteCu4Fe5S8Orth. 222
2.CB.10aLenaiteAgFeS2Tet. 42m : I42d
2.CB.10aGalliteCuGaS2Tet. 42m : I42d
2.CB.10aRoquesiteCuInS2Tet. 42m : I42d
2.CB.10aEskeborniteCuFeSe2Tet. 42m : P42c
2.CB.10a'UM1984-30-S:CuFeSn'Cu2Fe2Sn3S7
2.CB.10aChalcopyriteCuFeS2Tet. 42m : I42d
2.CB.10a'Unnamed (Cu-Zn-In Sulphide)'CuZn2InS4
2.CB.10bMooihoekiteCu9Fe9S16Tet. 42m : P42m
2.CB.10aLaforêtiteAgInS2Tet. 42m : I42d
2.CB.10bPutoraniteCu1.1Fe1.2S2Iso. m3m(4/m32/m) : Pn3m
2.CB.15aVelikiteCu2HgSnS4Tet. 4 : I4
2.CB.15c'UM2006-11-S:CuFeGeZn'Cu8(Fe,Zn)3Ge2S12 (?)
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4Tet. 42m : I42m
2.CB.15aKësteriteCu2ZnSnS4Tet. 4 : I4
2.CB.15aPirquitasiteAg2ZnSnS4Tet. 4 : I4
2.CB.15aStanniteCu2FeSnS4Tet. 42m : I42m
2.CB.15cStannoiditeCu+6Cu2+2(Fe2+,Zn)3Sn2S12Orth. 222 : I222
2.CB.15bMohiteCu2SnS3Mon.
2.CB.15aČernýiteCu2CdSnS4Tet. 42m : I42m
2.CB.15aIdaiteCu5FeS6Hex.
2.CB.15aFerrokësteriteCu2FeSnS4Tet. 4 : I4
2.CB.15aKuramiteCu3SnS4Tet. 42m : I42m
2.CB.17a v'Arsenic-bearing Renierite'Cu11GeAsFe4S16
2.CB.20MawsoniteCu6Fe2SnS8Tet. 42m : P4m2
2.CB.20ChatkaliteCu6FeSn2S8Tet. 42m : P4m2
2.CB.30'Frieseite'Ag2Fe5S8 (?)
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32Iso. 43m : P43n
2.CB.30'Argyropyrite'near Ag2Fe7S11
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32Iso. m3m(4/m32/m)
2.CB.30ColusiteCu13VAs3S16Iso. 43m : P43n
2.CB.30GermaniteCu13Fe2Ge2S16Iso. 43m : P43n
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32Iso. 43m : P43m
2.CB.30StibiocolusiteCu13V(Sb,Sn,As)3S16Iso. 43m : P43m
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32Iso. 43m : P43n
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4Iso.
2.CB.35aRenierite(Cu+,Zn)11Fe4(Ge4+,As5+)2S16Tet. 42m : P42c
2.CB.35aHemusiteCu6SnMoS8Iso.
2.CB.35bCatamarcaiteCu6GeWS8Hex. 6mm : P63mc
2.CB.35aVincienniteCu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16Tet.
2.CB.35aKiddcreekiteCu6SnWS8Iso. 43m : F43m
2.CB.35aPolkovicite(Fe,Pb)3(Ge,Fe)1-xS4Iso.
2.CB.40LautiteCuAsSOrth. mmm(2/m2/m2/m) : Pnma
2.CB.42LingbaoiteAgTe3Trig. 3m : R3m
2.CB.45CadmoseliteCdSeHex. 6mm : P63mc
2.CB.45RambergiteMnSHex. 6mm : P63mc
2.CB.45Buseckite(Fe,Zn,Mn)SHex. 6mm : P63mc
2.CB.45MaletoyvayamiteAu3Se4Te6Tric. 1 : P1
2.CB.45GreenockiteCdSHex. 6mm : P63mc
2.CB.45Wurtzite(Zn,Fe)SHex. 6mm : P63mc
2.CB.47MurchisiteCr5S6Trig. 3m(32/m) : P31c
2.CB.50'Zincselenide'ZnSe
2.CB.50WassoniteTiSTrig. 3m(32/m) : R3m
2.CB.52'Dzhezkazganite'ReMoCu2PbS6 ?Trig. 3m : R3m
2.CB.55bIsocubaniteCuFe2S3Iso. m3m(4/m32/m) : Fm3m
2.CB.55aCubaniteCuFe2S3Orth. mmm(2/m2/m2/m)
2.CB.60RaguiniteTlFeS2Orth.
2.CB.60PicotpauliteTlFe2S3Orth. mmm(2/m2/m2/m) : Cmcm
2.CB.65ArgentopyriteAgFe2S3Mon. 2/m
2.CB.65SternbergiteAgFe2S3Orth. mmm(2/m2/m2/m)
2.CB.70SulvaniteCu3VS4Iso. 43m : P43m
2.CB.75VulcaniteCuTeOrth. mmm(2/m2/m2/m)
2.CB.80EmpressiteAgTeOrth. mmm(2/m2/m2/m)
2.CB.85MuthmanniteAuAgTe2Mon. 2/m : P2/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.

Internet Links for OmariniiteHide

References for OmariniiteHide

Localities for OmariniiteHide

Showing 2 localities.

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.
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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.
Argentina (TL)
 
  • Catamarca Province
    • Andalgalá Department
      • Andalgalá
Hålenius et al. (2016) +1 other reference
Paar et al. (2004) +1 other reference
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