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Bayerite

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Löhley (Liley; Meerfeld Quarry; Slabik Quarry; Scheerer Quarry), Üdersdorf, Daun, Eifel Mts, Rhineland-Palatinate, Germany
© hamster@aon.at

Formula:
Al(OH)
 
3
System:MonoclinicColour:White
Name:The artificial compound is thought to have been named for the 19th century German metallurgist Karl J. Bayer (1847-1904). The name was then applied to the natural mineral.
Polymorph of:Doyleite, Gibbsite, Nordstrandite
This page provides mineralogical data about Bayerite.

Classification of Bayerite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/F.02-20
Nickel-Strunz 10th (pending) edition ID:4.FE.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
E : Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
Dana 8th edition ID:6.3.2.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
3 : X(OH)3
Hey's CIM Ref.:7.6.5

7 : Oxides and Hydroxides
6 : Oxides of Al
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Type Occurrence of Bayerite

Type Locality:Hatrurim Formation, Negev desert, Israel
Geological Setting of type material:Precipitates from high-aluminium gels at pH values above 5.8
Associated Minerals at type locality:
VateriteThaumasitePortlanditeGypsumEttringite
Calcite

Occurrences of Bayerite

Geological Setting:In bauxites; as weathered crusts on amphiboles and pyroxenes

Physical Properties of Bayerite

Diaphaneity (Transparency):Transparent, Translucent
Colour:White
Density (measured):2.53 g/cm3
Density (calculated):2.54 g/cm3

Crystallography of Bayerite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 5.0626Å, b = 8.6719Å, c = 9.4254Å
β = 90.26°
Ratio:a:b:c = 0.584 : 1 : 1.087
Unit Cell Volume:V 413.79 ų (Calculated from Unit Cell)
Z:8
Morphology:As very fine fibers; also as flaky and tabular crystals, to 0.1 mm; in radiating hemispherical aggregates and crusts
X-Ray Powder Diffraction:
d-spacingIntensity
4.73 (s)
2.21 (s)
4.36 (ms)
1.720 (m)
3.19 (w)
2.70 (vw)
Comments:Recorded on type material

Optical Data of Bayerite

Type:Biaxial (+)
RI values: nα = 1.565 - 1.574 nγ = 1.580 - 1.584
Maximum Birefringence:δ = 0.015

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Bayerite

Formula:
Al(OH)
 
3
Essential elements:Al, H, O
All elements listed in formula:Al, H, O
Analytical Data:No chemical analysis appears to have been published.
Relationship of Bayerite to other Species
Related Minerals - Nickel-Strunz Grouping):

- + 
4.FE.05Amakinite
(Fe
2+
 
,Mg)(OH)
 
2
4.FE.05Brucite
Mg(OH)
 
2
4.FE.05Portlandite
Ca(OH)
 
2
4.FE.05Pyrochroite
Mn(OH)
 
2
4.FE.05Theophrastite
Ni(OH)
 
2
4.FE.10Doyleite
Al(OH)
 
3
4.FE.10Gibbsite
Al(OH)
 
3
4.FE.10Nordstrandite
Al(OH)
 
3
4.FE.15Böhmite
AlO(OH)
4.FE.15Lepidocrocite
γ-Fe
3+
 
O(OH)
4.FE.20Grimaldiite
CrO(OH)
4.FE.20Heterogenite
CoO(OH)
4.FE.25Feitknechtite
Mn
3+
 
O(OH)
4.FE.25Lithiophorite
(Al,Li)MnO
 
2
(OH)
 
2
4.FE.30Quenselite
PbMnO
 
2
(OH)
4.FE.35Ferrihydrite
Fe
 
5
O
 
3
(OH)
 
9
4.FE.40Feroxyhyte
Fe
3+
 
O(OH)
4.FE.40Vernadite
(Mn
4+
 
,Fe
3+
 
,Ca,Na)(O,OH)
 
2
 · nH
 
2
O
4.FE.45Quetzalcoatlite
Zn
 
6
Cu
 
3
(TeO
 
6
)
 
2
(OH)
 
6
·Ag
 
x
Pb
 
y
Cl
 
x+2y
Related Minerals - Hey's Index Grouping:

- + 
7.6.1Corundum
Al
 
2
O
 
3
7.6.2Böhmite
AlO(OH)
7.6.2Diaspore
AlO(OH)
7.6.4Gibbsite
Al(OH)
 
3
7.6.6Nordstrandite
Al(OH)
 
3
7.6.7Doyleite
Al(OH)
 
3
7.6.8Akdalaite
4Al
 
2
O
 
3
 · H
 
2
O
Other Names for Bayerite
Other Languages:
German:Bayerit
Russian:Байерит
Spanish:Bayerita
Other Information
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Bayerite
Reference List:Gross, S. and Heller, L. (1963): A natural occurrence of bayerite. Mineralogical Magazine 33, 723-724. - American Mineralogist (1964) 49, 819 (abstract).



Khorosheva, D. P. (1968): Bayerite from the bauxite horizon of the middle Dnieper region. Doklady Acad. Nauk SSSR, 182, 123-126 (in Russian).



Schoen, R. and Roberson, C. E. (1970): Structures of aluminum hydroxide and geochemical implications. American Mineralogist 55, 43-77. 



McHardy, W. J. and Thomson, A. P. (1971): Conditions for the formation of bayerite and gibbsite. Mineralogical Magazine 38, 358-368.



Gross, S. (1977): The mineralogy of the Hatrurim Formation, Israel. Geol. Sur. Israel Bull. 70, 14-15.



Zigan, F., Joswig, W. and Burger, N. (1978): Die Wasserstoffpositionen im Bayerit, Al(OH)3. Zeitschrift für Kristallographie 148, 255-273 (in German with English abstract).



Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 47.
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    Localities for Bayerite
    






    


    

    
Hide Locality List
    

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality. 
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    (TL) indicates type locality.  ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.

    Argentina
     
    

    • San Luis
    
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 47
    Germany
     
    

    • Rhineland-Palatinate
    

      • Eifel Mts
    

        • Daun
    

          • Üdersdorf
    
    		Hentschel, G., Die Minerale der Üdersdorfer Lava, Lapis, Weise Verlag, München, 11/1989
    Greece
     
    

    • Attikí (Attica; Attika) Prefecture
    

      • Western Attikí District
    

        • Megara
    
    		Z. Maksimovitch, D.L. Bisch : "Brindleyite, a nickel-rich aluminous serpentinite mineral analogous to berthierine", Amer. Mineralogist, 1978, 63, 484-489" 
    Iran
     
    

    • West Azarbaijan Province
    

      • Takab (Takan Tepe)
    
    		Daliran, F. (2008): The carbonate rock-hosted epithermal gold deposit of Agdarreh, Takab geothermal field, NW Iran—hydrothermal alteration and mineralisation. Mineralium Deposita, 43, 383-404
    Israel
     
    

    • Negev desert
    
    		Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.; Mineralogical Magazine 1963 33 : 723-724.
    New Zealand
     
    

    • Kermadec Islands
    
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 47
    Russia
     
    

    • Eastern-Siberian Region
    

      • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
    

        • Enisei Range (Yenisei Ridge; Enisei Ridge)
    

    UK
     
    

    • England
    

      • Sussex
    
    		[Specimen in the Natural History Museum, London]
    

    


    

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