Meixnerite Mineral Data

General Meixnerite Information

Chemical Formula:

Mg6Al2(OH)18•4(H2O)

Composition:

Molecular Weight = 577.99 gm

Magnesium 25.23 % Mg 41.84 % MgO

Aluminum 9.34 % Al 17.64 % Al₂O₃

Hydrogen 4.53 % H 40.52 % H₂O

Oxygen 60.90 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₆Al₂(OH)₁₈•4(H₂O)

Environment:

Secondary mineral with talc in cracks of a pyrope-serpentine rock.

IMA Status:

Approved IMA 1975

Locality:

Ybba Persenberg, Austria. Link to MinDat.org Location Data.

Name Origin:

Named for Heinrich Herman Meixner (1908-1981), Austrian mineralogist.

Name Pronunciation:

Meixnerite + Pronunciation

Meixnerite Image

Images:

Meixnerite

Comments: Colorless crystals of meixnerite.
Location: Zeilberg Quarry, Maroldsweisach, Bavaria, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Meixnerite Crystallography

Axial Ratios:

a:c = 1:7.52716

Cell Dimensions:

a = 3.0463, c = 22.93, Z = 0.375; V = 184.28 Den(Calc)= 1.95

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

Physical Properties of Meixnerite

Cleavage:

{0001} Perfect

Color:

Colorless.

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Pearly

Streak:

white

Optical Properties of Meixnerite

Gladstone-Dale:

CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2608,KC= 0.258
Ncalc = 1.5

Optical Data:

Uniaxial (-), e=1.5, w=1.517, bire=0.0170.

Calculated Properties of Meixnerite

Electron Density:

Bulk Density (Electron Density)=2.02 gm/cc
note: Specific Gravity of Meixnerite =1.95 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Meixnerite= 0.94 barns/electron
U=PE_Meixnerite x rElectron Density= 1.91 barns/cc.

Radioactivity:

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

Meixnerite Classification

Dana Class:

06.04.06.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.04)containing multiple cations

(06.04.06)Dana Group

06.04.06.01 Meixnerite Mg6Al2(OH)18•4(H2O) R 3m 3 2/m

06.04.06.02 Fougerite! (Fe,Mg)6Fe2(OH)18•4(H2O) R 3m 3 2/m

Strunz Class:

04.FL.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FL -Hydroxides with H2O ï¿½ (OH); sheets of edge-sharing octahedra

04.FL.05 Akdalaite 5(Al2O3)•(H2O) P 6₃mc 6mm

04.FL.05 Meixnerite Mg6Al2(OH)18•4(H2O) R 3m 3 2/m

04.FL.05 Jamborite (Ni,Ni,Fe)(OH)2(OH,S,(H2O)) Unk Hex

04.FL.05 Iowaite Mg4Fe(OH)8OCl•2-4(H2O) R 3m 3 2/m

04.FL.05 Muskoxite Mg7Fe4O13•10(H2O) Unk (pseudo HEX-R) Trig

04.FL.05 Woodallite! Mg6Cr2(OH)16Cl2•4(H2O) R 3m 3 2/m

Other Meixnerite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Meixnerite :
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

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

Meixnerite

Mg6Al2(OH)18•4(H2O)
Dana No: 06.04.06.01 Strunz No: 04.FL.05
Locality:

Notes:

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