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Anthoinite

A valid IMA mineral species - grandfathered
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About AnthoiniteHide

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.
This page provides mineralogical data about Anthoinite.


Unique IdentifiersHide

Mindat ID:
252
Long-form identifier:
mindat:1:1:252:7
GUID
(UUID V4):
4e091aa8-14fc-4603-83a4-fabaf3f42593

IMA Classification of AnthoiniteHide

Approved, 'Grandfathered' (first described prior to 1959)

Classification of AnthoiniteHide

7.GB.35

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
27.4.4

27 : Sulphites, Chromates, Molybdates and Tungstates
4 : Tungstates

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

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

Physical Properties of AnthoiniteHide

Transparency:
Translucent
Colour:
White (when free of iron)
Streak:
White
Hardness:
Cleavage:
Perfect
On one direction.
Density:
4.78 - 4.87 g/cm3 (Measured)    4.84 g/cm3 (Calculated)

Optical Data of AnthoiniteHide

Type:
Biaxial
RI values:
n = 1.81 - 1.82
Birefringence:
noted under high magnification
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v
Comments:
Measured 2V not determined.

Chemistry of AnthoiniteHide

Mindat Formula:
AlWO3(OH)3

Crystallography of AnthoiniteHide

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)°
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 StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018557AnthoiniteGrey 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 95 639-6452010Mt Misobo Mine, Democratic Republic of the Congo0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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)
Comments:
Material from Nyamulilo Mine, Uganda; sample shows preferred orientation

Geological EnvironmentHide

Paragenetic Mode(s):
Geological Setting:
altered skarn (Kara Mine, Tasmania)

Type Occurrence of AnthoiniteHide

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 AnthoiniteHide

German:Anthoinit
Simplified Chinese:水钨铝矿
Spanish:Anthoinita

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Anthoinite associated with Hydrokenoelsmoreite2W2O6(H2O)
5 photos of Anthoinite associated with FerberiteFeWO4
5 photos of Anthoinite associated with QuartzSiO2
3 photos of Anthoinite associated with Ferritungstite
3 photos of Anthoinite associated with ReiniteFeWO4
1 photo of Anthoinite associated with CassiteriteSnO2
1 photo of Anthoinite associated with MpororoiteWAlO3(OH)3 · 2(H2O)

Related Minerals - Strunz-mindat GroupingHide

7.GB.WangpuiteK3(PO4)(Mo12O36)Iso. m3m (4/m 3 2/m) : Pn3m
7.GB.NatromolybditeNa2MoO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
7.GB.OotanniteTh4+2W6+4O16 · 5H2OMon. 2/m : P21/b
7.GB.05LindgreniteCu3(MoO4)2(OH)2Mon. 2/m : P21/m
7.GB.10SzenicsiteCu3(MoO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pnnm
7.GB.15CuprotungstiteCu2(WO4)(OH)2Tet. 4 2 2 : P41 21 2
7.GB.15UM1999-38-WO:CrV(V, Cr, W, O, H) [V:Cr:W ratio about 2:1:3]
7.GB.15HueniteCu4(MoO4)3(OH)2Trig. 3m : P3 1c
7.GB.20Phyllotungstite(H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.GB.25RankachiteCa0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2OMon. 2/m : P21/m
7.GB.30FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn
7.GB.35MpororoiteWAlO3(OH)3 · 2(H2O)Tric.
7.GB.40Obradovicite-KCu[K2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3]Orth. mmm (2/m 2/m 2/m) : Pmna
7.GB.45Mendozavilite-NaFe[Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe3+3O35(OH)2]Mon. 2/m : B2/m
7.GB.45Paramendozavilite[KAl4(H2O)30][Mo12P6Fe3+6O60(OH)13]Mon.
7.GB.45Obradovicite-NaCuNa2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] Orth. mmm (2/m 2/m 2/m) : Pmna
7.GB.45Obradovicite-NaNa[Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4] Orth.
7.GB.50Tancaite-(Ce)FeCe(MoO4)3 · 3H2O Trig. 3 : R3
7.GB.50Mendozavilite-NaCu[Na2(H2O)15Cu(H2O)6][Mo8P2Fe3+3O34(OH)3] Mon. 2/m : B2/m
7.GB.50Mendozavilite-KCa[K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3] Mon. 2/m : B2/m
7.GB.60PeterandreseniteMn4Nb6O19 · 14H2OMon. 2/m : B2/m
7.GB.60MelcheriteBa2Na2Mg[Nb6O19] · 6H2OTrig. 3 : R3
7.GB.60HansesmarkiteCa2Mn2Nb6O19 · 20H2OTric. 1 : P1
7.GB.65IchnusaiteTh(MoO4)2 · 3H2OMon. 2/m : P21/b
7.GB.70MarkascheriteCu3(MoO4)(OH)4 Mon. 2/m : P21/m
7.GB.75NuragheiteTh(MoO4)2 · H2OMon. 2/m : P21/b
7.GB.80OphiriteCa2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2OTric. 1 : P1

Other InformationHide

Notes:
Slowly attacked by HCl and HNO3; readily soluble in strong KOH solution.

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 AnthoiniteHide

References for AnthoiniteHide

Reference List:

Localities for AnthoiniteHide

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

- 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
 
  • Tasmania
    • Burnie City
      • Hampshire mining district
        • Kara Mines
Whitehead +2 other references
Canada
 
  • Yukon
    • Mayo mining district
T. S. Ercit and G. W. Robinson (1994) +1 other reference
DR Congo
 
  • Maniema
Mineralogical Society of America - ... +1 other reference
Henri Buttgenbach (1947)
Varlamoff (1947) +1 other reference
Japan
 
  • Kyoto Prefecture
    • Soraku District
      • Wazuka-cho
SHIMOBAYASHI et al. (2012)
Rwanda
 
  • Kigali City
    • Nyarugenge District
      • Kigali
J. W. Anthony et al.: Handbook of Mineralogy (1997)
  • Northern Province
    • Burera District
      • Kagogo
MINERALOGICAL MAGAZINE +1 other reference
Lapis 16 (9)
      • Rusarabuge
        • Gifurwe
Jedwab et al. (1979) +2 other references
    • Rulindo District
De Clercq et al. (Rwanda) +2 other references
Uganda
 
  • Western Region
    • Kabale
J. W. Anthony et al.: Handbook of Mineralogy et al. (1997)
MINERALOGICAL MAGAZINE +1 other reference
    • Kisoro
J. W. Anthony et al.: "Handbook of Mineralogy" (1997)
von Knorring et al. (1972)
 
Mineral and/or Locality  
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