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Sardignaite

A valid IMA mineral species
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07341510017667083128537.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
03821830017667083134968.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
07181740017619977851448.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
06231890017619937898533.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
07020680017619937576340.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
09166620017619938139013.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
07341510017667083128537.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
02650110017619977859926.jpg
Sardignaite

Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
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About SardignaiteHide

08379440017271952176000.jpg
Sardinia, Italy
Formula:
BiMo2O7(OH) · 2H2O
Colour:
pale yellow. rarely pale blue
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
4.82 (Calculated)
Crystal System:
Monoclinic
Name:
For the locality Sardigna (Sardinia), Italy.
Closely related to gelosaite.


Unique IdentifiersHide

Mindat ID:
39005
Long-form identifier:
mindat:1:1:39005:1

IMA Classification of SardignaiteHide

IMA status:
Approved
IMA Formula:
Bi3+Mo6+2O7(OH)·2H2O
Approval year:
2008

Classification of SardignaiteHide

Strunz-mindat (2026):
4.DM.50

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

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

Pronunciation of SardignaiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of SardignaiteHide

Lustre:
Adamantine
Transparency:
Transparent
Colour:
Pale yellow. rarely pale blue
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
4.82 g/cm3 (Calculated)

Chemistry of SardignaiteHide

Mindat Formula:
BiMo2O7(OH) · 2H2O
Element Weights:
Element% weight
Bi36.927 %
Mo33.912 %
O28.271 %
H0.891 %

Calculated from ideal end-member formula.
Elements listed:
Bi, H, Mo, O - search for minerals with similar chemistry

Crystallography of SardignaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 5.7797(7) Å, b = 11.567(1) Å, c = 6.3344(8) Å
β = 113.360(9)°
Ratio:
a:b:c = 0.5 : 1 : 0.548
Unit Cell V:
388.77 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0017091SardignaiteOrlandi P, Pasero M, Bigi S (2010) Sardignaite, a new mineral, the second known bismuth molybdate: description and crystal structure Mineralogy and Petrology 100 17-222010Su Senargiu, near Sarroch, Sardegna, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.79 Å(25)
5.03 Å(80)
3.327 Å(28)
3.206 Å(100)
3.120 Å(32)
2.590 Å(30)
2.115 Å(30)
1.992 Å(45)
Locality:
Punta de Su Seinargiu (Su Seinargiu; Su Senargiu), Sarroch, Metropolitan City of Cagliari, Sardinia, Italy

Geological EnvironmentHide

Type Occurrence of SardignaiteHide

Type Locality:
ⓘ Punta de Su Seinargiu (Su Seinargiu; Su Senargiu), Sarroch, Metropolitan City of Cagliari, Sardinia, Italy
General Appearance of Type Material:
thin prismatic crystals up to 1 mm in length
Place of Conservation of Type Material:
University Pisa 19350
Geological Setting of Type Material:
quartz veins within a granitic rock
Associated Minerals at Type Locality:
BismocliteBismuthiniteFerrimolybditeKoechliniteMolybdenite
Wulfenite

Synonyms of SardignaiteHide

Other Language Names for SardignaiteHide

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Sardignaite associated with MolybdeniteMoS2
1 photo of Sardignaite associated with KoechliniteBi2MoO6

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.30GelosaiteBiMo6+(2-5x)Mo5+6xO7(OH) · H2O Mon. 2/m : P21/m
4.DM.35EkebergiteThFeNb2O8Mon. 2/m : P2/b
4.DM.45RiesiteTiO2Mon. 2/m : P2/b
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

Fluorescence of SardignaiteHide

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 SardignaiteHide

References for SardignaiteHide

Localities for SardignaiteHide

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)
Austria
 
  • Salzburg
    • Zell am See District
      • Krimml
Walter et al. (2016)
        • Rainbach valley
Steiner et al. (2020)
Italy (TL)
 
  • Sardinia
    • Metropolitan City of Cagliari
      • Sarroch
Orlandi et al. (2010) +1 other reference
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