Sardignaite
A valid IMA mineral species
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About Sardignaite
Sardinia, Italy
Formula:
BiMo2O7(OH) · 2H2O
Colour:
pale yellow
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
4.82 (Calculated)
Crystal System:
Monoclinic
Name:
For the locality Sardigna (Sardinia), Italy.
Unique Identifiers
Mindat ID:
39005
Long-form identifier:
mindat:1:1:39005:1
GUID
(UUID V4):
(UUID V4):
41f1dbda-14ac-496b-8de8-bc17adf4d86b
IMA Classification of Sardignaite
Approved
Approval year:
2008
Classification of Sardignaite
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
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 Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sdi | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Sardignaite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Sardignaite
Adamantine
Transparency:
Transparent
Colour:
pale yellow
Streak:
white
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
4.82 g/cm3 (Calculated)
Chemistry of Sardignaite
Mindat Formula:
BiMo2O7(OH) · 2H2O
Elements listed:
Crystallography of Sardignaite
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)°
β = 113.360(9)°
Ratio:
a:b:c = 0.5 : 1 : 0.548
Unit Cell V:
388.77 ų (Calculated from Unit Cell)
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0017091 | Sardignaite | Orlandi P, Pasero M, Bigi S (2010) Sardignaite, a new mineral, the second known bismuth molybdate: description and crystal structure Mineralogy and Petrology 100 17-22 | 2010 | Su Senargiu, near Sarroch, Sardegna, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Sardignaite
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:
Synonyms of Sardignaite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Sardignaite associated with Molybdenite | MoS2 |
| 1 photo of Sardignaite associated with Koechlinite | Bi2MoO6 |
Related Minerals - Strunz-mindat Grouping
| 4.DM. | Bahariyaite | KMnO4 |
| 4.DM.05 | Rankamaite | (Na,K)3(Ta,Nb,Al)11(O,OH)31 |
| 4.DM.05 | Sosedkoite | (K,Na)5Al2(Ta,Nb)22O60 |
| 4.DM.15 | Cesplumtantite | (Cs,Na)2(Pb,Sb3+)3Ta8O24 |
| 4.DM.20 | Eyselite | Fe3+Ge4+3O7(OH) |
| 4.DM.25 | Kuranakhite | PbMn4+Te6+O6 |
| 4.DM.30 | Gelosaite | BiMo6+(2-5x)Mo5+6xO7(OH) · H2O |
| 4.DM.30 | Mambertiite | BiMo5+2.80O8(OH) |
| 4.DM.35 | Ekebergite | ThFeNb2O8 |
| 4.DM.45 | Riesite | TiO2 |
| 4.DM.55 | Tewite | (K1.5◻0.5)(Te1.25W0.25◻0.5)W5O19 |
| 4.DM.60 | Wumuite | KAl0.33W2.67O9 |
| 4.DM.60 | Kingsgateite | ZrMo6+2O7(OH)2 · 2H2O |
Fluorescence of Sardignaite
none
Other Information
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 Sardignaite
mindat.org URL:
https://www.mindat.org/min-39005.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Sardignaite
Reference List:
Localities for Sardignaite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Austria | |
| Walter et al. (2016) |
| Steiner et al. (2020) |
Italy (TL) | |
| Orlandi et al. (2010) +1 other reference |
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Punta de Su Seinargiu, Sarroch, Metropolitan City of Cagliari, Sardinia, Italy