Ichnusaite (original) (raw)
A valid IMA mineral species
About IchnusaiteHide
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Lustre:
Adamantine, Pearly
Specific Gravity:
4.262 (Calculated)
Crystal System:
Monoclinic
Name:
The name is from the old Greek name of Sardinia, Ιχνουσσα, ichnusa.
New structure type. (pronounced iknusa-ait)
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:45998:3
d7a550e0-6888-4d78-a1ed-1bac45e4a919
IMA Classification of IchnusaiteHide
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Type description reference:
Orlandi, P., Biagioni, C., Bindi, L., Nestola, F. (2014) Ichnusaite, Th(MoO4)2·3H2O, the first natural thorium molybdate: Occurrence, description, and crystal structure. American Mineralogist, 99 (10) 2089-2094 doi:10.2138/am-2014-4844
Classification of IchnusaiteHide
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7.GB.65
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Ich | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of IchnusaiteHide
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Density:
4.262 g/cm3 (Calculated)
Comment:
Could not be measured on type material
Chemistry of IchnusaiteHide
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Mindat Formula:
Th(MoO4)2 · 3H2O
Crystallography of IchnusaiteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.6797(12) Å, b = 10.3771(13) Å, c = 9.3782(12) Å
β = 90.00(1)°
Ratio:
a:b:c = 0.933 : 1 : 0.904
Morphology:
Thin {100} tabular crystals
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020407 | Ichnusaite | Orlandi P, Biagioni C, Bindi L, Nestola F (2014) Ichnusaite, Th(MoO4)2*3H2O, the first natural thorium molybdate: occurrence, description, and crystal structure American Mineralogist 99 2089-2094 | 2014 | Su Seinargiu, Sarroch, Cagliari, Sardinia, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.7 Å | (mw) |
| 5.66 Å | (m) |
| 5.19 Å | (mw) |
| 4.69 Å | (mw) |
| 3.930 Å | (m) |
| 3.479 Å | (s) |
| 3.257 Å | (s) |
| 3.074 Å | (m) |
Comments:
From Type Description.
Geological EnvironmentHide
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Type Occurrence of IchnusaiteHide
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General Appearance of Type Material:
Thin {100} tabular crystals, up to 200 μm in length
Place of Conservation of Type Material:
Type material is deposited in the collections of the Museo di Storia Naturale, Universita` di Pisa, Calci (Pisa), Italy, catalogue number 19679
Geological Setting of Type Material:
Alteration of molybdenite ores under basic pH conditions.
Associated Minerals at Type Locality:
Reference:
Orlandi, P., Biagioni, C., Bindi, L., Nestola, F. (2014) Ichnusaite, Th(MoO4)2·3H2O, the first natural thorium molybdate: occurrence, description, and crystal structure. American Mineralogist: 99: 2089-2094.
Synonyms of IchnusaiteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 7.GB. | Wangpuite | K3(PO4)(Mo12O36) | Iso. m_3_m _(_4/_m_32/m ) : P n_3_m |
|---|---|---|---|
| 7.GB. | Natromolybdite | Na2MoO4 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 7.GB. | Ootannite | Th4+2W6+4O16 · 5H2O | Mon. 2/m : _P_21/b |
| 7.GB.05 | Lindgrenite | Cu3(MoO4)2(OH)2 | Mon. 2/m : _P_21/m |
| 7.GB.10 | Szenicsite | Cu3(MoO4)(OH)4 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 7.GB.15 | Cuprotungstite | Cu2(WO4)(OH)2 | Tet. 422 : _P_41212 |
| 7.GB.15 | UM1999-38-WO:CrV | (V, Cr, W, O, H) [V:Cr:W ratio about 2:1:3] | |
| 7.GB.15 | Huenite | Cu4(MoO4)3(OH)2 | Trig. 3_m_ : P_31_c |
| 7.GB.20 | Phyllotungstite | (H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K) | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 7.GB.25 | Rankachite | Ca0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2O | Mon. 2/m : _P_21/m |
| 7.GB.30 | Ferrimolybdite | Fe2(MoO4)3 · nH2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m n |
| 7.GB.35 | Anthoinite | AlWO3(OH)3 | Tric. 1 |
| 7.GB.35 | Mpororoite | WAlO3(OH)3 · 2(H2O) | Tric. |
| 7.GB.40 | Obradovicite-KCu | [K2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] | Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a |
| 7.GB.45 | Mendozavilite-NaFe | [Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe3+3O35(OH)2] | Mon. 2/m : _B_2/m |
| 7.GB.45 | Paramendozavilite | [KAl4(H2O)30][Mo12P6Fe3+6O60(OH)13] | Mon. |
| 7.GB.45 | Obradovicite-NaCu | Na2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] | Orth. m m m _(_2/_m_2/_m_2/m ) : P m n a |
| 7.GB.45 | Obradovicite-NaNa | [Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4] | Orth. |
| 7.GB.50 | Tancaite-(Ce) | FeCe(MoO4)3 · 3H2O | Trig. 3 : _R_3 |
| 7.GB.50 | Mendozavilite-NaCu | [Na2(H2O)15Cu(H2O)6][Mo8P2Fe3+3O34(OH)3] | Mon. 2/m : _B_2/m |
| 7.GB.50 | Mendozavilite-KCa | [K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3] | Mon. 2/m : _B_2/m |
| 7.GB.60 | Peterandresenite | Mn4Nb6O19 · 14H2O | Mon. 2/m : _B_2/m |
| 7.GB.60 | Melcherite | Ba2Na2Mg[Nb6O19] · 6H2O | Trig. 3 : _R_3 |
| 7.GB.60 | Hansesmarkite | Ca2Mn2Nb6O19 · 20H2O | Tric. 1 : _P_1 |
| 7.GB.70 | Markascherite | Cu3(MoO4)(OH)4 | Mon. 2/m : _P_21/m |
| 7.GB.75 | Nuragheite | Th(MoO4)2 · H2O | Mon. 2/m : _P_21/b |
| 7.GB.80 | Ophirite | Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O | Tric. 1 : _P_1 |
Other InformationHide
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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 IchnusaiteHide
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References for IchnusaiteHide
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Reference List:
Orlandi, P., Biagioni, C., Bindi, L., Nestola, F. (2014) Ichnusaite, Th(MoO4)2·3H2O, the first natural thorium molybdate: Occurrence, description, and crystal structure. American Mineralogist, 99 (10) 2089-2094 doi:10.2138/am-2014-4844
Localities for IchnusaiteHide
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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.
Locality ListHide
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- 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.
| Austria | |
|---|---|
| Salzburg Zell am See District Krimml Rainbach valley ⓘ Roßkar - Nördliche Zillerscharte area ? | Steiner et al. (2020) |
| Italy (TL) | |
| Sardinia Metropolitan City of Cagliari Sarroch ⓘ Punta de Su Seinargiu (Su Seinargiu; Su Senargiu) (TL) | Orlandi et al. (2014) +1 other reference |