Bayerite Mineral Data

(Translated by https://www.hiragana.jp/)
Bayerite Mineral Data

General Bayerite Information

Chemical Formula:

Al(OH)3

Composition:

Molecular Weight = 78.00 gm

Aluminum 34.59 % Al 65.36 % Al₂O₃

Hydrogen 3.88 % H 34.64 % H₂O

Oxygen 61.53 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al(OH)₃

Environment:

Probably precipitated from high-aluminum gels on carbonates at pH > 5.8 (Hatrurim Formation, Israel); as weathered crusts on amphiboles and pyroxenes (Dnieper region, Russia); in ba uxites.

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

In the Hatrurim Formation, Israel. From an undefined area in the Dnieper region, and in the Listvennoye deposit, Yenisei Ridge, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

The artificial compound is thought to have been named for the 19th-century German metallurgist Karl J. Bayer; the name was then applied to the natural mineral.

Name Pronunciation:

Bayerite

Synonym:

ICSD 200413

PDF 20-11

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Bayerite Crystallography

Axial Ratios:

a:b:c =0.5837:1:0.5435

Cell Dimensions:

a = 5.062, b = 8.671, c = 4.713, Z = 4; beta = 90.27° V = 206.86 Den(Calc)= 2.50

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.222(1), 4.71(0.9), 4.35(0.7),

Crystal Structure:

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Rothbauer R , Zigan F , O Daniel H , Zeitschrift fur Kristallographie , 125 (1967) p.317-331, Verfeinerung der struktur des bayerits, Al(OH)3

Physical Properties of Bayerite

Color:

Colorless, White.

Density:

2.53

Diaphaneity:

Transparent

Streak:

white

Optical Properties of Bayerite

Gladstone-Dale:

CI meas= 0.089 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.079 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2332,KPDmeas= 0.2304,KC= 0.2531
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (?), b=1.583

Calculated Properties of Bayerite

Electron Density:

Bulk Density (Electron Density)=2.56 gm/cc
note: Specific Gravity of Bayerite =2.50 gm/cc.

Fermion Index:

Fermion Index = 0.0003011748
Boson Index = 0.9996988252

Photoelectric:

PE_Bayerite= 1.10 barns/electron
U=PE_Bayerite x rElectron Density= 2.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bayerite is Not Radioactive

Bayerite Classification

Dana Class:

06.03.02.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.03)with (OH)3 or (OH)6 groups

(06.03.02)Dana Group

06.03.02.01 Bayerite Al(OH)3 P 2₁/a 2/m

Strunz Class:

04.FE.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FE -Hydroxides with OH, without H2O; sheets of edge-sharing octahedra

04.FE.10 Bayerite Al(OH)3 P 2₁/a 2/m

04.FE.10 Doyleite Al(OH)3 P1 1

04.FE.10 Gibbsite Al(OH)3 P 2₁/n 2/m

04.FE.10 Nordstrandite Al(OH)3 P1 1

Other Bayerite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Bayerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Bayerite Specimen Label here :

Bayerite

Al(OH)3
Dana No: 06.03.02.01 Strunz No: 04.FE.10
Locality:

Notes: