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Specific Gravity:
Crystal System:
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.
This page provides mineralogical data about Bayerite.

Hide all sections | Show all sections

Classification of BayeriteHide

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

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

3 : X(OH)3

7 : Oxides and Hydroxides
6 : Oxides of Al

Physical Properties of BayeriteHide

Transparent, Translucent
2.53 g/cm3 (Measured)    2.54 g/cm3 (Calculated)

Optical Data of BayeriteHide

Biaxial (+)
RI values:
nα = 1.565 - 1.574 nγ = 1.580 - 1.584
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of BayeriteHide


Crystallography of BayeriteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 5.0626 Å, b = 8.6719 Å, c = 9.4254 Å
β = 90.26°
a:b:c = 0.584 : 1 : 1.087
Unit Cell V:
413.79 ų (Calculated from Unit Cell)
As very fine fibers; also as flaky and tabular crystals, to 0.1 mm; in radiating hemispherical aggregates and crusts

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.73 (s)
4.36 (ms)
3.19 (w)
2.70 (vw)
2.21 (s)
2.16 (vw)
1.720 (m)
Recorded on type material

Type Occurrence of BayeriteHide

Geological Setting of Type Material:
Precipitates from high-aluminium gels at pH values above 5.8
Associated Minerals at Type Locality:

Other Language Names for BayeriteHide

Simplified Chinese:与拜三水铝石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Aluminium1 photo of Bayerite associated with Aluminium on

Related Minerals - Nickel-Strunz GroupingHide

4.FE.05BruciteMg(OH)2Trig. 3m (3 2/m) : P3m1
4.FE.05PortlanditeCa(OH)2Trig. 3m (3 2/m)
4.FE.05PyrochroiteMn(OH)2Trig. 3m (3 2/m)
4.FE.05TheophrastiteNi(OH)2Trig. 3m (3 2/m) : P3m1
4.FE.10GibbsiteAl(OH)3Mon. 2/m
4.FE.10NordstranditeAl(OH)3Tric. 1 : P1
4.FE.15BöhmiteAlO(OH)Orth. mmm (2/m 2/m 2/m)
4.FE.15Lepidocrociteγ-Fe3+O(OH)Orth. mm2 : Cmc21
4.FE.25FeitknechtiteMn3+O(OH)Trig. 3m (3 2/m) : P3m1
4.FE.25Lithiophorite(Al,Li)MnO2(OH)2Trig. 3m (3 2/m) : R3m
4.FE.30QuenselitePbMnO2(OH)Mon. 2/m : P2/b
4.FE.40Vernadite(Mn4+,Fe3+,Ca,Na)(O,OH)2 · nH2OHex.
4.FE.45QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2yTrig. 3m (3 2/m) : P3m1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.6.1CorundumAl2O3Trig. 3m (3 2/m) : R3c
7.6.2BöhmiteAlO(OH)Orth. mmm (2/m 2/m 2/m)
7.6.2DiasporeAlO(OH)Orth. mmm (2/m 2/m 2/m)
7.6.4GibbsiteAl(OH)3Mon. 2/m
7.6.6NordstranditeAl(OH)3Tric. 1 : P1
7.6.8Akdalaite5Al2O3 · H2OHex.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for BayeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.

Internet Links for BayeriteHide

Localities for BayeriteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • San Luis
    • Chacabuco department
      • Sierra de la Estranzuela
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 47
  • Queensland
    • Cook Shire
      • Cape York Peninsula
Taylor, G., & Eggleton, T. (2004). Little balls”: The origin of the Weipa bauxite. In Regolith (Vol. 2004, pp. 350-254).
  • Guangxi Zhuang Autonomous Region
    • Baise Prefecture
      • Pingguo Co.
Zhongcao Liang (1983): Geology and Prospecting 19(8), 24-28; Xinyu Cao and Tongjiang Tang (1986): Geology and Prospecting 22(2), 18-23
  • Rhineland-Palatinate
    • Eifel
      • Daun
        • Üdersdorf
Hentschel, G., Die Minerale der Üdersdorfer Lava, Lapis, Weise Verlag, München, 11/1989
  • Attikí Prefecture (Attica; Attika)
    • 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"
  • West Azarbaijan Province (West Azerbaijan 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 (TL)
  • Negev
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
  • Upper Silesia (Śląskie)
    • Upper Silesian Coal Basin
      • Rybnik Coal Area
        • Radlin
Łukasz Kruszewski (2012) Unique chloride assemblage of exhalative origin from burning coal-mining dump in Radlin (Rybnik Coal Area, S Poland). Mineralogical Society of Poland Special Papers 40
  • Eastern-Siberian Region
    • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
      • Enisei Range (Yenisei Ridge; Enisei Ridge)
Handbook of Mineralogy
  • England
    • East Sussex
      • Brighton
[Specimen in the Natural History Museum, London]
  • Nebraska
    • Cedar Co.
R.M. Joeckel, K.D. Wally, B.J. Ang Clement, P.R. Hanson, J.S. Dillon, S.K. Wilson (2011) Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA. CATENA, Volume 85:253-266
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