Bayerite (original) (raw)

A valid IMA mineral species - grandfathered

About BayeriteHide

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Crystal System:

Monoclinic

Name:

The artificial compound is thought to have been named for Karl Josef Bayer (4 March 1847, Bielitz , Austrian Silesia – 4 October 1904, Rietzdorf, now Rečica ob Paki, Slovenia). The name was then applied to the natural mineral. Bayer was a chemist who in 1887, invented the Bayer process of extracting alumina from bauxite, essential to this day to the economical production of aluminium.

This page provides mineralogical data about Bayerite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:580:7

9443b226-716e-4c41-9087-28a9e282c050

IMA Classification of BayeriteHide

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

Type description reference:

Classification of BayeriteHide

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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

6.3.2.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
3 : X(OH)3

7.6.5

7 : Oxides and Hydroxides
6 : Oxides of Al

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.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of BayeriteHide

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Transparency:

Transparent, Translucent

Density:

2.53 g/cm3 (Measured) 2.54 g/cm3 (Calculated)

Optical Data of BayeriteHide

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RI values:

_n_α = 1.565 - 1.574 _n_γ = 1.580 - 1.584

δ = 0.015

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of BayeriteHide

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Crystallography of BayeriteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 5.0626 Å, b = 8.6719 Å, c = 9.4254 Å
β = 90.26°

Ratio:

a:b:c = 0.584 : 1 : 1.087

Unit Cell V:

413.79 ų (Calculated from Unit Cell)

Morphology:

As very fine fibers; also as flaky and tabular crystals, to 0.1 mm; in radiating hemispherical aggregates and crusts

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Recorded on type material

Geological EnvironmentHide

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Geological Setting:

In bauxites; as weathered crusts on amphiboles and pyroxenes

Type Occurrence of BayeriteHide

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Place of Conservation of Type Material:

Geological Survey of Israel, Jerusalem, Israel, numbers SG 168 and SG 523.

Geological Setting of Type Material:

Precipitates from high-aluminium gels at pH values above 5.8

Associated Minerals at Type Locality:

Reference:

Gedeon, T.G. (1956) Bayerite in Hungarian bauxite. Acta geologica Academiae Scientiarum Hungaricae: 4: 95-105.

Other Language Names for BayeriteHide

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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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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 BayeriteHide

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References for BayeriteHide

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Reference List:

Ruan, H.D., Frost, R.L., Kloprogge, J.T., Schulze, D.G., Duong, L. (2003) FT-Raman spectroscopy and SEM of gibbsite, bayerite, boehmite and diaspore in relation to the characterization of bauxite. in 2001. A Clay Odyssey, Elsevier B.V. (Amsterdam, Netherlands): 545-552.

Localities for BayeriteHide

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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.