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Anthoinite
A valid IMA mineral species - grandfathered
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About Anthoinite
Formula:
AlWO3(OH)3
Colour:
White (when free of iron)
Lustre:
Dull
Hardness:
1
Specific Gravity:
4.78 - 4.87
Crystal System:
Triclinic
Name:
For Raymond Anthoine (Charleroi, Hainaut province, Belgium, May 12 1888 - Brussels, June 4 1971), Belgian mining engineer who wrote on prospecting of alluvial deposits.
Type Locality:
This page provides mineralogical data about Anthoinite.
Unique Identifiers
Mindat ID:
252
Long-form identifier:
mindat:1:1:252:7
Similar Names
| Anthonyite | A valid IMA mineral species | Cu(OH,Cl)2 · 3H2O |
IMA Classification of Anthoinite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
AlW6+O3(OH)3
Classification of Anthoinite
7.GB.35
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
48.3.3.1
48 : ANHYDROUS MOLYBDATES AND TUNGSTATES
3 : Basic Anhydrous Molybdates and Tungstates
48 : ANHYDROUS MOLYBDATES AND TUNGSTATES
3 : Basic Anhydrous Molybdates and Tungstates
27.4.4
27 : Sulphites, Chromates, Molybdates and Tungstates
4 : Tungstates
27 : Sulphites, Chromates, Molybdates and Tungstates
4 : Tungstates
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 for Standard |
|---|---|---|
| Atn | 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 Anthoinite
Dull
Transparency:
Translucent
Colour:
White (when free of iron)
Streak:
White
Hardness:
1 on Mohs scale
Cleavage:
Perfect
On one direction.
On one direction.
Density:
4.78 - 4.87 g/cm3 (Measured) 4.84 g/cm3 (Calculated)
Optical Data of Anthoinite
Type:
Biaxial
RI values:
n = 1.81 - 1.82
Birefringence:
noted under high magnification
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Dispersion:
r > v
Comments:
Measured 2V not determined.
Chemistry of Anthoinite
Mindat Formula:
AlWO3(OH)3
Element Weights:
Elements listed:
Crystallography of Anthoinite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 8.196(1) Å, b = 9.187(1) Å, c = 11.316(1) Å
α = 92.82(1)°, β = 94.08(1)°, γ = 90.23(1)°
α = 92.82(1)°, β = 94.08(1)°, γ = 90.23(1)°
Ratio:
a:b:c = 0.892 : 1 : 1.232
Unit Cell V:
848.84 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals platy, flattened on {010}. Commonly as powdery or chalky masses and as pseudomorphs after large scheelite crystals.
Comment:
Space-group setting I-1.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0018557 | Anthoinite | Grey I E, Madsen I C, Mills S J, Hatert F, Peterson V K, Bastow T J (2010) A new type of cubic-stacked layer structure in anthoinite, AlWO3(OH)3 American Mineralogist 95 639-645 |  | 2010 | Mt Misobo Mine, Democratic Republic of the Congo | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.63 Å | (100) |
| 4.19 Å | (83) |
| 3.058 Å | (71) |
| 3.97 Å | (69) |
| 2.462 Å | (61) |
| 4.33 Å | (37) |
| 4.12 Å | (35) |
Locality:
Comments:
Material from Nyamulilo Mine, Uganda; sample shows preferred orientation
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) | |
| 26 : Hadean detrital minerals | |
| High-𝑇 alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations |
Geological Setting:
altered skarn (Kara Mine, Tasmania)
Type Occurrence of Anthoinite
General Appearance of Type Material:
powdery to chalky masses, and pseudomorphs after large scheelite crystals; as platy crystals to a few mm
Place of Conservation of Type Material:
Royal Museum for Central Africa, Tervuren, Belgium (No. 2.426)
Geological Setting of Type Material:
Sn-W placers, W-bearing quartz veins
Associated Minerals at Type Locality:
Other Language Names for Anthoinite
Dutch:Anthoiniet
French:Anthoinite
German:Anthoinit
Norwegian:Anthoinitt
Simplified Chinese:水钨铝矿
Spanish:Anthoinita
Common Associates
Associations Based on Photo Data:
| 6 photos of Anthoinite associated with Ferberite | FeWO4 |
| 5 photos of Anthoinite associated with Mpororoite | WAlO3(OH)3 · 2(H2O) |
| 5 photos of Anthoinite associated with Quartz | SiO2 |
| 5 photos of Anthoinite associated with Hydrokenoelsmoreite | ◻2W2O6(H2O) |
| 4 photos of Anthoinite associated with Scheelite | Ca(WO4) |
| 4 photos of Anthoinite associated with Magnetite | Fe2+Fe3+2O4 |
| 3 photos of Anthoinite associated with 'Reinite' | FeWO4 |
| 3 photos of Anthoinite associated with 'Ferritungstite' | ◻2(W,Fe3+)2(O,OH)6(H2O) |
Related Minerals - Strunz-mindat Grouping
| 7.GB. | Stunorthropite | (NH4)4[Mo2O6(MoO4)2] |
| 7.GB. | Hartkoppeite | Ca4Mn2+Mo6+6As5+4O32(OH)2(H2O)14 · 5H2O |
| 7.GB. | Wangpuite | K3(PO4)(Mo12O36) |
| 7.GB. | Alexearlite | Hg3S2(MoO4) |
| 7.GB. | Ootannite | Th4+2W6+4O16 · 5H2O |
| 7.GB. | Natromolybdite | Na2MoO4 · 2H2O |
| 7.GB. | Marsaalamite-(Y) | Y(MoO4)(OH) |
| 7.GB.05 | Lindgrenite | Cu3(MoO4)2(OH)2 |
| 7.GB.10 | Szenicsite | Cu3(MoO4)(OH)4 |
| 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 |
| 7.GB.15 | Cuprotungstite | Cu2(WO4)(OH)2 |
| 7.GB.20 | Phyllotungstite | (H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K) |
| 7.GB.25 | Rankachite | Ca0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2O |
| 7.GB.30 | Ferrimolybdite | Fe2(MoO4)3 · nH2O |
| 7.GB.35 | Mpororoite | WAlO3(OH)3 · 2(H2O) |
| 7.GB.40 | Obradovicite-KCu | [K2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] |
| 7.GB.45 | Paramendozavilite | [KAl4(H2O)30][Mo12P6Fe3+6O60(OH)13] |
| 7.GB.45 | Mendozavilite-NaFe | [Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe3+3O35(OH)2] |
| 7.GB.45 | Obradovicite-NaCu | Na2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] |
| 7.GB.45 | Obradovicite-NaNa | [Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4] |
| 7.GB.50 | Tancaite-(Ce) | FeCe(MoO4)3 · 3H2O |
| 7.GB.50 | Mendozavilite-NaCu | [Na2(H2O)15Cu(H2O)6][Mo8P2Fe3+3O34(OH)3] |
| 7.GB.50 | Mendozavilite-KCa | [K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3] |
| 7.GB.60 | Peterandresenite | Mn4Nb6O19 · 14H2O |
| 7.GB.60 | Hansesmarkite | Ca2Mn2Nb6O19 · 20H2O |
| 7.GB.60 | Melcherite | Ba2Na2Mg[Nb6O19] · 6H2O |
| 7.GB.65 | Ichnusaite | Th(MoO4)2 · 3H2O |
| 7.GB.70 | Markascherite | Cu3(MoO4)(OH)4 |
| 7.GB.75 | Nuragheite | Th(MoO4)2 · H2O |
| 7.GB.80 | Ophirite | Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O |
Other Information
Notes:
Slowly attacked by HCl and HNO3; readily soluble in strong KOH solution.
Forms pseudomorphs after Scheelite crystals.
Forms pseudomorphs after Scheelite crystals.
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 Anthoinite
mindat.org URL:
https://www.mindat.org/min-252.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Gifurwe Mines, Gifurwe, Rusarabuge, Burera District, Northern Province, Rwanda