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Gelosaite

A valid IMA mineral species
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01705320017366114928490.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
02530160017271978805758.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
06046510017271978838290.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
05367730017272057691938.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
07021800017866630749175.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
05765870017866630777660.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
05367730017272057691938.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
02530160017271978805758.jpg
Gelosaite

Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia
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About GelosaiteHide

02306340017272471854140.jpg
Mario Gelosa
Formula:
BiMo6+(2-5x)Mo5+6xO7(OH) · H2O
(0 ≤ x ≤ 0.4)
Colour:
yellow, yellowish green, pale blue, colorless
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
5.114 (Calculated)
Crystal System:
Monoclinic
Name:
After Mario Gelosa (1947–2006), an Italian mineral collector from Porto Torres, Sardinia, Italy.
Closely related to sardignaite.


Unique IdentifiersHide

Mindat ID:
39660
Long-form identifier:
mindat:1:1:39660:2

IMA Classification of GelosaiteHide

IMA status:
Approved
IMA Formula:
Bi3+Mo6+(2-5x)Mo5+6xO7(OH)·H2O (0≤x≤0.4)
Approval year:
2009

Classification of GelosaiteHide

Strunz-mindat (2026):
4.DM.30

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
Dana 8th ed.:
49.3.8.

49 : HYDRATED MOLYBDATES AND TUNGSTATES
3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen

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

Physical Properties of GelosaiteHide

Lustre:
Adamantine
Transparency:
Transparent
Colour:
Yellow, yellowish green, pale blue, colorless
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.114 g/cm3 (Calculated)

Optical Data of GelosaiteHide

Bireflectance:
birefringent
Pleochroism:
Visible
Comments:
blue and pale blue
Comments:
on pale blue crystals

Chemistry of GelosaiteHide

Mindat Formula:
BiMo6+(2-5x)Mo5+6xO7(OH) · H2O

(0 ≤ x ≤ 0.4)
Elements listed:
Bi, H, Mo, O - search for minerals with similar chemistry

Crystallography of GelosaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 5.855(1) Å, b = 9.048(1) Å, c = 13.920(3) Å
β = 100.44(3)°
Ratio:
a:b:c = 0.647 : 1 : 1.538
Unit Cell V:
725.22 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Common - law unknown
Comment:
space group P21/n

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018668GelosaiteOrlandi P, Demartin F, Pasero M, Leverett P, Williams P A, Hibbs D E (2011) Gelosaite, BiMo6+(2-5x)Mo5+6xO7(OH)*H2O (0<=x<=0.4), a new mineral from Su Senargiu (CA), Sardinia, Italy, and a second occurrence from Kingsgate, New England, Australia American Mineralogist 96 268-2732011Su Senargiu, Sardinia, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.83 Å(100)
3.41 Å(21)
3.30 Å(25)
3.015 Å(50)
2.755 Å(60)
2.080 Å(50)
1.688 Å(20)
1.509 Å(30)
Locality:
Punta de Su Seinargiu (Su Seinargiu; Su Senargiu), Sarroch, Metropolitan City of Cagliari, Sardinia, Italy

Geological EnvironmentHide

Type Occurrence of GelosaiteHide

Type Locality:
ⓘ Punta de Su Seinargiu (Su Seinargiu; Su Senargiu), Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
General Appearance of Type Material:
It occurs as prismatic and very thin, elongated [010] and tabular {100} crystals up to 1 mm in length and a few micrometers in diameter
Place of Conservation of Type Material:
Museo di Storia Naturale e del Territorio of the University of Pisa, catalog number 18910.
Geological Setting of Type Material:
Gelosaite is a secondary mineral formed in the oxidation zone
Associated Minerals at Type Locality:
FerrimolybditeKoechliniteMuscoviteSardignaiteWulfenite

Synonyms of GelosaiteHide

Other Language Names for GelosaiteHide

Dutch:Gelosaiet
German:Gelosait

Common AssociatesHide

Associations Based on Photo Data:
17 photos of Gelosaite associated with QuartzSiO2
7 photos of Gelosaite associated with MolybdeniteMoS2
2 photos of Gelosaite associated with KingsgateiteZrMo6+2O7(OH)2 · 2H2O
2 photos of Gelosaite associated with 'Smoky Quartz'SiO2
2 photos of Gelosaite associated with FerrimolybditeFe2(MoO4)3 · nH2O
1 photo of Gelosaite associated with BrookiteTiO2
1 photo of Gelosaite associated with AnataseTiO2
1 photo of Gelosaite associated with IchnusaiteTh(MoO4)2 · 3H2O
1 photo of Gelosaite associated with TooeleiteFe3+6(As3+O3)4(SO4)(OH)4 · 4H2O
1 photo of Gelosaite associated with ScoroditeFe3+AsO4 · 2H2O

Related Minerals - Strunz-mindat GroupingHide

4.DM.SugarwhiteitePb2Te5O12Mon. 2/m : P21/b
4.DM.ZuoliniteBa2Sr(Nb4.5Fe3+0.5)O15Tet. 4/mmm(4/m2/m2/m) : P4/mbm
4.DM.BahariyaiteKMnO4Orth. mmm(2/m2/m2/m) : Pnma
4.DM.05Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31Orth. mmm(2/m2/m2/m) : Cmmm
4.DM.05Sosedkoite(K,Na)5Al2(Ta,Nb)22O60Orth.
4.DM.15Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24Tet.
4.DM.20EyseliteFe3+Ge4+3O7(OH)Orth.
4.DM.25KonzettiteCaMn4+Te6+O6Trig. 32 : P312
4.DM.25KuranakhitePbMn4+Te6+O6Orth.
4.DM.30MambertiiteBiMo5+2.80O8(OH)Tric. 1 : P1
4.DM.35EkebergiteThFeNb2O8Mon. 2/m : P2/b
4.DM.45RiesiteTiO2Mon. 2/m : P2/b
4.DM.50SardignaiteBiMo2O7(OH) · 2H2OMon. 2/m : P21/m
4.DM.55Tewite(K1.5◻0.5)(Te1.25W0.25◻0.5)W5O19Orth. mmm(2/m2/m2/m) : Pban
4.DM.60WumuiteK(W2.67Al0.33)O9Hex. 6/mmm(6/m2/m2/m) : P6/mmm
4.DM.60KingsgateiteZrMo6+2O7(OH)2 · 2H2OTet. 4mm : I41cd
4.DM.60MorningstariteNa(W2.67Fe3+0.33)O9 · H2OHex. 6/mmm(6/m2/m2/m) : P6/mmm

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 GelosaiteHide

References for GelosaiteHide

Localities for GelosaiteHide

Showing 4 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.
Australia
 
  • New South Wales
    • Gough Co.
Elliott et al. (2026)
John Haupt collection +2 other references
Orlandi et al. (2011)
Italy (TL)
 
  • Sardinia
    • Metropolitan City of Cagliari
      • Sarroch
IMA Approvals - Sept. 2009. +2 other references
Quick NavTopAbout GelosaiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
 
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