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Gaotaiite

A valid IMA mineral species
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Formula:
Ir3Te8
Colour:
Steel black
Lustre:
Metallic
Hardness:
3
Specific Gravity:
10.00 (Calculated)
Crystal System:
Isometric
Member of:
Pyrite Group
Name:
Named by Yu Zuxiang in 1995 after the Gaotai village near the type locality.

In earlier Chinese references on platinum group minerals, the type locality was referred to as the "Gao District", derived from the first syllable of "Gaositai", and later as "Gaotai village". However, the latter however does not appear to exist.
This page provides mineralogical data about Gaotaiite.


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Unique IdentifiersHide

Mindat ID:
6963
Long-form identifier:
mindat:1:1:6963:8

Similar NamesHide

CattiiteA valid IMA mineral speciesMg3(PO4)2 · 22H2O
GaititeA valid IMA mineral speciesCa2Zn(AsO4)2 · 2H2O
GauteiteA rock subtype
GötiitA synonym of Goethite

IMA Classification of GaotaiiteHide

Classification of GaotaiiteHide

Strunz-mindat (2026):
2.EB.05a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
Dana 8th ed.:
2.12.1.18

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2

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

Physical Properties of GaotaiiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Steel black
Streak:
Black
Hardness:
3 on Mohs scale
Hardness:
VHN100=94 - 117 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
None observed
Density:
10.00 g/cm3 (Calculated)

Optical Data of GaotaiiteHide

Type:
Isotropic
Anisotropism:
None, but sometimes weak with blusih or yellowish tint
Colour in reflected light:
bright white with a bluish tint.
Internal Reflections:
None

Chemistry of GaotaiiteHide

Mindat Formula:
Ir3Te8
Element Weights:
Element% weight
Te63.902 %
Ir36.098 %

Calculated from ideal end-member formula.
Elements listed:
Ir, Te - search for minerals with similar chemistry

Crystallography of GaotaiiteHide

Crystal System:
Isometric
Class (H-M):
m3(2/m3) - Diploidal
Space Group:
Pa3
Setting:
Pa3
Cell Parameters:
a = 6.413(4) Å
Unit Cell V:
263.74 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
37 : Layered igneous intrusions and related PGE minerals

Type Occurrence of GaotaiiteHide

Type Locality:
ⓘ Gaositai Cr-PGE deposit (Gao District; Gaotai village), Gaositai, Chengde County, Chengde, Hebei, China
General Appearance of Type Material:
As subhedral grains, in aggregates to 0.2 mm;
massive, in veinlets.
Place of Conservation of Type Material:
Geological Museum of China
Geological Setting of Type Material:
crushed chromite ores and placer concentrates
Associated Minerals at Type Locality:
ChromiteErlichmaniteNative Gold'Iridisite'Native Iridium
LauriteMagnetiteNative OsmiumNative PlatinumShuangfengite
Reference:
Yu, Z. (1995) Gaotaiite - A new iridium telluride. Acta Mineralogica Sinica: 15(1): 1-4. (in Chinese with English abstract)

Synonyms of GaotaiiteHide

Other Language Names for GaotaiiteHide

Dutch:Gaotaiiet
German:Gaotaiit
Spanish:Gaotaiita

Relationship of Gaotaiite to other SpeciesHide

Member of:
Pyrite Group
Other Members of Pyrite Group:
AurostibiteAuSb2Iso. m3(2/m3) : Pa3
CattieriteCoS2Iso. m3(2/m3) : Pa3
DzharkeniteFeSe2Iso. m3(2/m3) : Pa3
ErlichmaniteOsS2Iso. m3(2/m3) : Pa3
FukuchiliteCu3FeS8Iso. m3(2/m3) : Pa3
GeversitePtSb2Iso. m3(2/m3) : Pa3
HaueriteMnS2Iso. m3(2/m3) : Pa3
InsizwaitePtBi2Iso. m3(2/m3) : Pa3
KruťaiteCuSe2Iso. m3(2/m3) : Pa3
LauriteRuS2Iso. m3(2/m3) : Pa3
Penroseite(Ni,Co,Cu)Se2Iso. m3(2/m3) : Pa3
PyriteFeS2Iso. m3(2/m3) : Pa3
SperrylitePtAs2Iso. m3(2/m3) : Pa3
TrogtaliteCoSe2Iso. m3(2/m3) : Pa3
VaesiteNiS2Iso. m3(2/m3) : Pa3
Villamanínite(Cu,Ni,Co,Fe)S2Tric.

Related Minerals - Strunz-mindat GroupingHide

2.EB.SelenolauriteRuSe2Iso. m3(2/m3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 23 : P213
2.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m : P21/b
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aVaesiteNiS2Iso. m3(2/m3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3(2/m3) : Pa3
2.EB.05aLauriteRuS2Iso. m3(2/m3) : Pa3
2.EB.05aPenroseite(Ni,Co,Cu)Se2Iso. m3(2/m3) : Pa3
2.EB.05aFukuchiliteCu3FeS8Iso. m3(2/m3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aErlichmaniteOsS2Iso. m3(2/m3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3(2/m3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3(2/m3) : Pa3
2.EB.05aCattieriteCoS2Iso. m3(2/m3) : Pa3
2.EB.05aAurostibiteAuSb2Iso. m3(2/m3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3(2/m3) : Pa3
2.EB.05a v'Cayeuxite'
2.EB.05aKruťaiteCuSe2Iso. m3(2/m3) : Pa3
2.EB.05aPyriteFeS2Iso. m3(2/m3) : Pa3
2.EB.05aInsizwaitePtBi2Iso. m3(2/m3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aDzharkeniteFeSe2Iso. m3(2/m3) : Pa3
2.EB.10aMarcasiteFeS2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm(2/m2/m2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.10ePararammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pbca
2.EB.10aMattagamiteCoTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10dCostibiteCoSbSOrth. mm2 : Pmn21
2.EB.10bAlloclasiteCo1-xFexAsSMon. 2 : P21
2.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth. mm2 : Pmn21
2.EB.10aPetříčekiteCuSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aKulleruditeNiSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFerroseliteFeSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15bSeinäjokiteFeSb2Orth.
2.EB.15aRammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aNisbiteNiSb2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aLöllingiteFeAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aSafflorite(Co,Ni,Fe)As2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aOmeiiteOsAs2Orth.
2.EB.15aAnduoiteRuAs2Orth.
2.EB.20ArsenopyriteFeAsSMon. 2/m : P21/b
2.EB.20Ruarsite(Ru,Os)AsSMon.
2.EB.20Osarsite(Os,Ru)AsSMon.
2.EB.20GudmunditeFeSbSMon. 2/m : P21/b
2.EB.25MayingiteIrBiTeIso. m3(2/m3) : Pa3
2.EB.25MaslovitePtBiTeIso. 23 : P213
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25SulfopadmaitePdBiSIso. 23 : P213
2.EB.25JolliffeiteNiAsSeIso. m3(2/m3) : Pa3
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GuixiangiteNiBiSIso. 23 : P213
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25 va'Antimony-bearing Gersdorffite'Ni(As,Sb)S
2.EB.25KalungaitePdAsSeIso. m3(2/m3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3(2/m3) : Pa3
2.EB.25MicheneritePdBiTeIso. 23 : P213
2.EB.25GersdorffiteNiAsSIso. 23 : P213
2.EB.25MilotaitePdSbSeIso. 23 : P213
2.EB.25TolovkiteIrSbSIso.
2.EB.25'Platarsite'Pt(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 23 : P213
2.EB.25KvačekiteNiSbSeIso. 23 : P213
2.EB.25KrutoviteNiAs2Iso. 23 : P213
2.EB.25PadmaitePdBiSeIso. 432
2.EB.25UllmanniteNiSbSIso. 23 : P213
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3(2/m3) : Pa3
2.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.EB.35RheniiteReS2Tric. 1 : P1

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 GaotaiiteHide

References for GaotaiiteHide

Localities for GaotaiiteHide

Showing 1 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.
China (TL)
 
  • Hebei
    • Chengde
      • Chengde County
        • Gaositai
Zuxiang Yu (1995) +1 other reference
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